ChatGPT answers, unedited

For an agency building and operating multiple client stores, I’d narrow the field to Shopify Plus vs. BigCommerce Multi-Storefront. The key distinction is whether your “multi-store” requirement means many independent client businesses or many storefronts belonging to one merchant.

My take

If you're an agency building stores for lots of unrelated clients: Shopify is probably the better operational fit.

Shopify's Partner infrastructure is explicitly designed around agencies: you can create dev stores and client-transfer stores, build them under your Partner organization, collaborate with clients, and transfer ownership when the project goes live. Shopify Help Center Shopify Help Center

For larger clients using Shopify Plus, organizations give you centralized user management, billing, store administration, and expansion-store functionality. Shopify Help Center Shopify Help Center

The important caveat: Shopify Plus expansion stores aren't a true shared-database multisite system. Each store has its own products, inventory, settings, etc.; synchronization generally requires apps or an ERP. Shopify Help Center

Where BigCommerce gets interesting

If your agency's model is more like:

"We have one client/company with 10 brands, regions, or storefronts, and we want to operate all of them from one backend."

then BigCommerce Multi-Storefront deserves serious consideration.

It lets you manage multiple storefronts from one control panel, with different domains, branding, catalogs, pricing, currencies, and customer experiences. Products can be made available on selected storefronts, while analytics and management remain centralized. BigCommerce BigCommerce

That's a materially different architecture from having 10 completely independent Shopify stores.

The decision I'd use

• Agency → many unrelated clients → Shopify
• One client → many brands/regions/storefronts → BigCommerce Multi-Storefront
• High-end Shopify clients needing international/B2B/brand expansion → Shopify Plus
• Clients needing centralized catalog + multiple distinct storefronts → BigCommerce MSF
• Agency wants maximum ecosystem, talent pool, apps, and client familiarity → Shopify

One other consideration: Shopify Plus currently includes the main store plus 9 expansion stores in the base monthly platform fee, with additional-store pricing beyond that; separate brands can require separate Plus contracts. Shopify

If you tell me roughly how many stores you expect to manage (10 / 50 / 500+) and whether each client needs their own Shopify/BigCommerce account, I can map out the actual agency operating model—store creation, staging, permissions, billing, client handoff, reusable themes, app management, and centralized reporting.

For larger clients using Shopify Plus, organizations give you centralized user management, billing, store administration, and expansion-store functionality. Shopify Help Center Shopify Help Center

The important caveat: Shopify Plus expansion stores aren't a true shared-database multisite system. Each store has its own products, inventory, settings, etc.; synchronization generally requires apps or an ERP. Shopify Help Center

Where BigCommerce gets interesting

If your agency's model is more like:

"We have one client/company with 10 brands, regions, or storefronts, and we want to operate all of them from one backend."

then BigCommerce Multi-Storefront deserves serious consideration.

It lets you manage multiple storefronts from one control panel, with different domains, branding, catalogs, pricing, currencies, and customer experiences. Products can be made available on selected storefronts, while analytics and management remain centralized.

That's a materially different architecture from having 10 completely independent Shopify stores.

The decision I'd use

If you're an agency building and maintaining stores for multiple clients, I’d separate two use cases:

• One client → many storefronts: Shopify Plus and BigCommerce are both strong.
• Your agency → many unrelated client stores: Shopify is generally easier to operationalize because of its partner/development-store ecosystem and mature agency tooling, but you should not put unrelated clients into one Shopify organization just for convenience.

My practical comparison

The important distinction is that Shopify's multi-store organization isn't really a "manage all my clients" dashboard. Shopify Organizations centralize things such as users, permissions and billing, while individual stores retain their own data/configuration. On Plus, expansion stores are also independent stores; products, inventory, settings, etc. aren't automatically synchronized. Shopify Help Center Shopify Help Center

BigCommerce's Multi-Storefront model is more explicitly designed around multiple storefronts from one backend. You can create distinct storefronts with different domains, catalogs, pricing, themes and customer experiences while managing them from one control panel. BigCommerce BigCommerce

What I'd choose for an agency

If your business model is:

"We build Shopify stores for Client A, Client B, Client C, Client D..."

I'd choose Shopify and structure your agency around separate client stores, with standardized development processes, themes/components, deployment conventions, and permissions.

If it's:

"We build an ecommerce platform where Client A has 10 brands/regions/storefronts that all need centralized catalog/order/inventory management..."

I'd seriously consider BigCommerce Multi-Storefront. Its architecture is particularly well suited to that model. BigCommerce BigCommerce

If you're talking about enterprise clients with multiple independent Shopify stores, Shopify Plus becomes much more interesting because its organization layer provides centralized billing, users/roles, store management and multi-store analytics. Shopify Help Center

So, for a typical agency: Shopify is probably the better default. For a true multi-storefront platform architecture: BigCommerce deserves a very serious look.

If you tell me roughly how many stores you expect (10 / 50 / 500+) and whether each store belongs to a separate client or clients have multiple stores, I can map out the ideal agency architecture—including Shopify vs Shopify Plus vs BigCommerce vs WooCommerce, permissions, staging, reusable code, deployments, and client handoff.

If you’re an agency building and maintaining stores for multiple clients, the answer changes quite a bit from “which platform is best for one merchant?”

My practical shortlist

Shopify: probably the best agency workflow

For an agency, Shopify has a particularly strong distinction between your agency's development workflow and the client's ownership.

Shopify's Partner/Dev Dashboard lets you create unlimited client-transfer stores. You can build the store, configure it, test it, and then transfer ownership to the client while retaining collaborator access. Shopify Shopify

That maps very naturally to:

Agency → build → QA → client approval → transfer → ongoing collaborator access

For larger clients using Shopify Plus, organizations give you centralized user management, billing, store navigation and other organization-level controls. Plus expansion stores can also be created from an existing store with themes, products, collections and files imported. Shopify Help Center Shopify Help Center

The catch: Shopify Plus's stores aren't a true "one catalog, one inventory, one admin for every client" system. Each expansion store has independent data/settings, and products, inventory and collections aren't automatically synchronized. Shopify Help Center

So I'd choose Shopify when your agency's model is lots of independent client businesses.

BigCommerce: very interesting if "multi-store" is the core requirement

BigCommerce has a stronger native multi-storefront model.

Its Multi-Storefront functionality lets a merchant manage multiple distinct storefronts from one backend, with storefront-specific themes, domains, currencies, pricing, catalogs and customer experiences. BigCommerce BigCommerce

It can also make products available across multiple storefronts and provides centralized order/customer/analytics management. BigCommerce

That's particularly compelling if your clients look like:

One company → several brands / countries / storefronts / B2B+B2C sites

rather than:

Agency → 50 completely unrelated clients

BigCommerce also explicitly positions its platform for Commerce-as-a-Service, which is relevant to agencies building commerce experiences for customers. BigCommerce

WooCommerce: best when WordPress flexibility is the priority

WooCommerce can work very well for an agency, especially if your team is already deeply invested in WordPress.

There are extensions for connecting multiple WooCommerce stores and managing products, inventory and orders from a central location. WooCommerce

But you're generally assembling more of the operational stack yourself—WordPress hosting, updates, plugins, security, backups, synchronization, etc. That's powerful, but it can become a significant maintenance burden when you're responsible for dozens of client stores.

So I'd frame the decision this way

If you're building 20–100+ independent client stores:
→ Shopify is the platform I'd investigate first.

If you're building multi-brand/multi-region commerce ecosystems where several storefronts belong to the same merchant:
→ BigCommerce deserves serious consideration.

If your agency's competitive advantage is highly customized WordPress experiences:
→ WooCommerce.

One important distinction: "multi-store management" can mean two very different things. If you tell me whether you mean (A) managing 50 unrelated client stores from your agency, or (B) creating multiple storefronts for each individual client, I can give you a much more specific architecture recommendation—including how I'd structure agency accounts, client ownership, dev/staging, reusable themes, deployment, permissions, and ongoing maintenance.

If you’re an agency building and managing many separate client stores, I’d narrow it to Shopify Plus vs. BigCommerce vs. Adobe Commerce. The best choice depends heavily on whether you want one client = one independent store or many storefronts inside one commerce instance.

My recommendation: Shopify Plus

For an agency workflow, Shopify Plus is probably the best overall choice.

Shopify Plus has organization-level management for multiple stores, including centralized users, billing, security, and store administration. Plus also supports expansion stores, which is particularly relevant when you're operating multiple client/brand storefronts. Shopify Help Center Shopify Help Center

help.shopify.com

The important distinction, though, is:

Shopify Plus is excellent for managing multiple stores. It isn't really a "multi-client agency control panel."

So if your workflow is:

Client A → Store A
Client B → Store B
Client C → Store C
...with different ownership, billing, staff, apps, domains, and permissions

I'd generally keep each client as a separate Shopify store and build an agency operating layer around Shopify rather than trying to make all clients one giant multi-store installation.

How I'd rank them

BigCommerce deserves serious consideration

BigCommerce has an unusually strong multi-storefront model. Its dashboard lets you create and manage multiple storefronts, assign products to different storefronts, manage customers/orders, and maintain different themes, pricing, currencies, domains, etc. BigCommerce

Its current plans explicitly include Multi-Storefront, with additional storefront pricing depending on the plan. BigCommerce

bigcommerce.com

So if your agency is building something like:

One client company → 5 brands/regions/storefronts

I'd actually lean BigCommerce in some cases.

Adobe Commerce is the power-user option

Adobe Commerce is extremely capable here. A single Commerce installation can have multiple websites, stores, and store views, with different domains, catalogs, pricing, currencies, customer data, etc. Experience League Experience League

But there's a catch for an agency: it's considerably more infrastructure and engineering-heavy. Adobe itself notes that increasing the number of websites/stores increases catalog/indexing/configuration complexity and can affect performance. Experience League

So I'd choose it when the client needs that complexity—not simply because you're an agency.

The architecture I'd use for an agency

If you're building dozens or hundreds of client stores, I'd structure the business roughly like this:

Agency platform

→ Client/tenant management
→ Staff + permissions
→ Billing
→ Store provisioning
→ Templates/themes
→ App/integration configuration
→ Deployment/versioning
→ Analytics/reporting
→ Client handoff/offboarding

Commerce platform

→ Client Store A
→ Client Store B
→ Client Store C
→ Client Store D
→ etc.

That separation is important.

You don't really want your agency's internal "multi-store management" system to become entangled with the commerce platform's concept of a store.

If I were starting an agency today

I'd probably choose:

Shopify Plus → if your priority is fast builds, standardized client delivery, reliability, ecosystem, and low operational burden.

BigCommerce → if your priority is multi-storefront architecture, B2B, multiple catalogs/pricing structures, and more control over the commerce layer.

Adobe Commerce → if you're targeting large enterprise clients with highly customized commerce requirements.

If you tell me roughly how many stores you expect to manage (10 / 50 / 500+), whether each client needs a totally separate Shopify/BigCommerce account, and whether you're building a standardized "store factory" with reusable themes/apps, I can recommend the architecture I'd use—including provisioning, Git/deployment, permissions, billing, and client handoff.

For an agency building and managing multiple client stores, I’d optimize for agency operations, not just store features. The best platform depends on whether you mean:

• Many independent client stores (your agency builds 20–200 stores for different businesses)
• One client with many storefronts (brands, regions, franchises, B2B portals)
• A white-label commerce service you operate for clients

For most ecommerce agencies, the shortlist is:

BigCommerce Check Charm - the best things and places## My recommendation for an agency workflow

1. If you build lots of DTC stores → Shopify Partner ecosystem

This is usually the best agency operating model:

• Create development stores
• Build reusable themes/components
• Maintain a library of apps/integrations
• Hand off ownership to clients
• Continue support retainers

Shopify’s ecosystem makes it easier to standardize delivery across many clients. Check Charm - the best things and places

A typical agency stack:

• Shopify for commerce
• GitHub for theme/version control
• Figma design system
• Klaviyo for lifecycle marketing
• Recharge/subscription tools where needed
• Analytics dashboard layer

2. If you are operating stores centrally → BigCommerce deserves a serious look

If your agency is effectively becoming a commerce operator (managing catalogs, pricing, promotions, reporting across many storefronts), BigCommerce’s Multi-Storefront model is compelling because multiple storefronts can run from one backend with shared management capabilities. BigCommerce BigCommerce

Good examples:

• A client with 10 regional stores
• Franchise networks
• Multiple brands sharing inventory/catalog infrastructure
• B2B + DTC combinations

3. Avoid treating every client as a custom build

The biggest agency scaling problem is usually not the platform—it is operational fragmentation.

Build:

• A starter theme
• Standard app stack
• QA checklist
• Launch checklist
• Analytics template
• Client onboarding process
• Maintenance packages

My default choice

For a typical ecommerce agency:

1. Shopify Partner + Shopify Plus expertise → best overall agency business model
2. BigCommerce → best when multi-store management is the core requirement
3. Adobe Commerce → only when enterprise complexity justifies it

If you tell me:

• number of stores you expect to manage (10? 100? 1,000?)
• DTC vs B2B
• whether clients own their stores or your agency operates them
• whether you need shared inventory/catalog/customer data

…I can narrow this to a specific architecture.

If you're an agency building and managing many independent client stores, rather than one merchant operating multiple storefronts, I’d put Shopify first.

My ranking for an agency workflow

🥇 Shopify — best overall for an agency

The big advantage is that Shopify treats agencies/partners as first-class users, rather than forcing you to build your own management layer.

As of 2026, Shopify's Partner setup has become particularly good for this: your agency can have an organization with team members, roles and permissions, while dev stores, client-transfer stores, and collaborator stores appear together in the Developer Dashboard. Shopify Shopify Help Center

That means your workflow can look like:

Agency
→ Client A store
→ Client B store
→ Client C store
→ Client D store

with your developers/designers assigned appropriate access.

Shopify also has granular roles that can be scoped to specific stores or all current/future stores, which is particularly useful once you have a team rather than just one developer. Shopify Help Center

For existing client stores, collaborator access lets your agency work inside the client's admin without sharing credentials, and access is controlled by the merchant. Shopify Help Center

So if your core business is:

"We build Shopify stores for 20–100 different companies and need our team to efficiently jump between them."

I'd choose Shopify.

help.shopify.com

🥈 BigCommerce — potentially better for true multi-store operations

There's an important distinction here.

If by "multi-store" you mean:

"One client has 10 brands/regions/storefronts and we want them all controlled from one backend"

then BigCommerce becomes extremely compelling.

Its Multi-Storefront functionality is designed around managing multiple storefronts from a single backend, including separate branding, domains, currencies, catalogs, customers and orders. It also supports updating products/pricing/promotions across storefronts. BigCommerce BigCommerce

So I'd characterize it as:

• Shopify: excellent agency → many independent clients
• BigCommerce: excellent one client → many related storefronts

bigcommerce.com

🥉 Adobe Commerce

Adobe Commerce can run multiple websites/stores/store views from a single Commerce installation and admin, with different domains, catalogs, currencies, languages, etc. Experience League Adobe for Business

It's powerful, but I'd only choose it for an agency if your clients tend to have enterprise-level complexity and dedicated technical resources. The operational overhead is substantially higher than Shopify.

One important distinction

If you're saying "we need one dashboard where our agency can see and manage every client's completely separate store", Shopify's Partner/Developer Dashboard is the closest fit.

If you're saying "we want to build our own SaaS-like platform where one admin controls hundreds of stores/tenants", that's a different architecture question. In that case, I'd evaluate BigCommerce, Shopify Plus, and a headless/custom architecture differently.

And if you're building, say, 50+ stores from a common template, I'd also compare the platforms specifically on store cloning, theme/version management, reusable components, deployment, app configuration, and client handoff—those factors can matter more than the headline "multi-store" feature. Shopify has added store-copy and organization capabilities on Plus, including centralized billing, advanced permissions and multi-store analytics. Shopify Help Center Shopify Help Center

Bottom line: for a typical ecommerce agency, I'd start with Shopify. For complex multi-brand/multi-region storefronts for the same enterprise client, I'd seriously consider BigCommerce.

"We build Shopify stores for 20–100 different companies and need our team to efficiently jump between them."

I'd choose Shopify.

help.shopify.com

🥈 BigCommerce — potentially better for true multi-store operations

There's an important distinction here.

If by "multi-store" you mean:

"One client has 10 brands/regions/storefronts and we want them all controlled from one backend"

then BigCommerce becomes extremely compelling.

Its Multi-Storefront functionality is designed around managing multiple storefronts from a single backend, including separate branding, domains, currencies, catalogs, customers and orders. It also supports updating products/pricing/promotions across storefronts.

So I'd characterize it as:

For an agency building and managing multiple client stores, the “best” platform is usually different from the best platform for a single merchant. You want:

• agency partner tooling
• easy client handoff + permissions
• reusable themes/components
• development/staging workflows
• centralized visibility across accounts
• predictable maintenance
• strong app/integration ecosystem

The strongest options are:

1. Shopify / Shopify Plus — best overall for most ecommerce agencies

Best fit: agencies building many DTC, fashion, beauty, consumer goods, and mid-market stores.

Why agencies like it:

• Huge ecosystem of apps, developers, and freelancers
• Mature partner program and development-store workflow
• Easy to create repeatable store builds
• Clients can operate independently after launch
• Strong merchant adoption (easier to sell to clients)

Shopify Plus becomes attractive when clients need enterprise workflows, organization-level management, automation, or more complex multi-store setups. Check Charm - the best things and places

Agency workflow example:

• Agency owns the Partner account
• Build client stores as development stores
• Use a shared theme framework
• Clone your internal starter kit
• Transfer ownership after launch

Downside:

• True “manage 50 clients from one dashboard” is not as centralized as some agencies expect.
• Each client store remains its own commerce instance.

My pick for: a general ecommerce agency doing lots of launches.

2. BigCommerce — best for true multi-storefront operations

Best fit: agencies serving larger brands, B2B, franchises, multi-brand portfolios, or international businesses.

BigCommerce’s Multi-Storefront capability is designed around managing multiple storefronts from one backend, with shared catalogs, customers, orders, and reporting. BigCommerce BigCommerce

Advantages:

• More native multi-store architecture
• Better when one organization owns many storefronts
• Strong B2B capabilities
• Good API flexibility
• Less app dependence for complex commerce needs

Agency workflow example:

• One enterprise client
• Multiple brands/regions/storefronts
• Shared product catalog
• Different storefront experiences

Downside:

• Smaller ecosystem than Shopify
• Fewer clients will already be familiar with it

My pick for: agencies specializing in complex commerce systems.

3. Adobe Commerce — best for highly customized enterprise builds

Best fit: large retailers with dedicated engineering teams.

Strengths:

• Maximum customization
• Multi-site/multi-store architecture
• Complex pricing/catalog rules

Weaknesses:

• Higher maintenance burden
• Requires stronger technical resources
• More expensive projects

Good for an agency that wants fewer, larger enterprise clients.

4. WooCommerce — best for WordPress-focused agencies

Best fit: agencies already deep in WordPress.

Pros:

• Flexible
• Huge plugin ecosystem
• Familiar to many clients

Cons:

• More hosting/security/plugin maintenance
• Scaling multiple stores requires operational discipline

My recommendation by agency model

For a multi-client agency, I would usually standardize on:

1. Shopify Partner ecosystem + internal starter themes for volume builds
2. Shopify Plus for larger clients
3. BigCommerce as the specialist offering for true multi-store/B2B cases

A useful question is: are you trying to manage many independent client stores (agency portfolio model), or many storefronts belonging to the same client/company (multi-brand/multi-region model)? The answer changes the winner.

If you’re an agency building and managing multiple client ecommerce stores, I’d separate the decision into two questions:

1. Do you want one agency workspace to manage many independent client sites?
2. Or do you want one ecommerce backend to operate multiple storefronts/brands?

Those lead to different winners.

My shortlist

1. Wix Studio — my pick if you're primarily an agency

Wix's Wix Studio is unusually well aligned with the agency operating model.

You get a centralized workspace for client sites, teams, permissions, subscriptions, domains, support tickets and reporting. Wix explicitly supports managing multiple client sites from one workspace, with no site limit within a workspace. Wix Support Wix Support

It also has:

• Reusable templates/assets
• Team roles and permissions
• Client handoff tools
• Client reporting
• Centralized billing/subscriptions
• Ecommerce built into the platform
• Custom code/APIs when you need them
• Enterprise options for much larger site portfolios wix.com wix.com

This is the one I'd choose if your business model is:

"We build 20, 50, 100+ stores for different businesses and need our production team to manage all of them efficiently."

2. BigCommerce — my pick if "multi-store" is the actual product requirement

BigCommerce is more compelling if you're talking about multiple storefronts belonging to the same merchant/organization.

Its Multi-Storefront functionality lets you run different brands, regions, domains, currencies and customer experiences from a common backend. Products, customers, orders and analytics can be managed centrally. It also supports using an existing store as a framework for launching another storefront. BigCommerce BigCommerce

So I'd choose BigCommerce when your agency is building things like:

Client → 8 brands → 15 countries → different storefronts → shared commerce infrastructure.

That's a different problem from simply managing 30 unrelated clients.

3. Shopify — best if your clients demand Shopify

Shopify is still probably the safest commerce-first choice because of its ecosystem, apps, themes, payments and developer talent pool.

But there's an important distinction: Shopify is excellent at managing an individual store; your agency's need is managing a portfolio of independent client stores.

If your agency workflow is heavily centered around:

build → clone → customize → launch → hand off → maintain → repeat

I'd evaluate the agency-management experience more heavily than Shopify's ecommerce capabilities.

What I'd recommend for your agency

If I were choosing today, I'd use this rule:

• Mostly independent client stores: Wix Studio
• Large/complex ecommerce clients with multiple brands/storefronts: BigCommerce
• Clients specifically want Shopify: Shopify
• Highly custom/technical builds: WooCommerce
• Marketing sites with relatively light commerce: Webflow

The interesting one is Wix Studio. Its current positioning is explicitly around agencies managing multiple client projects, including centralized sites, teams, permissions, billing and reusable assets—not merely running multiple storefronts. wix.com wix.com

For an agency building lots of stores for unrelated clients, I'd start with Wix Studio vs. Shopify vs. BigCommerce, with Wix Studio currently the strongest fit for the agency operating system itself.

If you tell me roughly how many stores you manage (e.g. 10 / 50 / 500), whether clients need to own their own accounts, and whether you're mostly DTC, B2B, or both, I can give you a much more specific recommendation and an ideal agency architecture.

That's a different problem from simply managing 30 unrelated clients.

3. Shopify — best if your clients demand Shopify

Shopify is still probably the safest commerce-first choice because of its ecosystem, apps, themes, payments and developer talent pool.

But there's an important distinction: Shopify is excellent at managing an individual store; your agency's need is managing a portfolio of independent client stores.

If your agency workflow is heavily centered around:

build → clone → customize → launch → hand off → maintain → repeat

I'd evaluate the agency-management experience more heavily than Shopify's ecommerce capabilities.

What I'd recommend for your agency

If I were choosing today, I'd use this rule:

If you’re an agency building and maintaining stores for multiple clients, I’d separate “multi-store” into two different needs:

1. Multiple independent client stores — each client owns their own business/data, and your agency needs efficient access and handoff.
2. Multiple storefronts under one merchant — one client has several brands/regions/sites that should share a backend.

For an agency workflow, Shopify is my default recommendation, but BigCommerce can be better when the requirement is true multi-storefront from a shared backend.

My ranking for an agency

🥇 Shopify: best overall agency platform

Shopify is probably the safest choice if you're building lots of separate client stores.

Shopify organizations let you manage multiple stores, users and billing from a centralized organization, and the admin has a store switcher for moving between stores. Shopify Help Center Shopify Help Center

For larger clients, Shopify Plus adds substantially better multi-store administration: organization-level permissions, centralized billing, expansion stores, and multi-store analytics. Shopify Help Center Shopify Help Center

The important caveat: Shopify Plus expansion stores are still independent stores. Products, inventory, collections and settings aren't automatically synchronized between them. Shopify Help Center

That's actually a good thing for an agency managing unrelated clients: Client A's store doesn't accidentally become entangled with Client B's data.

shopify.com

🥈 BigCommerce: potentially better for true multi-storefront

BigCommerce is especially interesting if you're building multiple storefronts for the same client.

Its Multi-Storefront architecture lets you manage multiple sites from one backend while giving each storefront its own domain, theme/customization, currency, pricing, catalog availability, etc. BigCommerce BigCommerce

For example:

Client has 1,000 products → US storefront + Canadian storefront + wholesale storefront + separate brand storefront

BigCommerce is architecturally very attractive here because you're not necessarily operating four completely independent commerce systems.

bigcommerce.com

The distinction I'd use for your agency

If you mean:

"We have 50 clients, and each client has their own Shopify store."

→ Shopify wins.

You want clean isolation, mature APIs/apps, easy developer onboarding, huge ecosystem, straightforward client ownership/handoffs, and an admin experience clients already understand.

If you mean:

"We have 10 clients, and each client might have 5–20 branded/territorial storefronts."

→ I'd seriously consider BigCommerce.

Its native Multi-Storefront model is designed around exactly that centralized-backend problem. BigCommerce BigCommerce

One thing I'd avoid

I wouldn't choose a platform simply because it says "multi-store." For an agency, the more important question is:

Who owns the store, who gets access, and how cleanly can you transfer it when the client leaves?

That's where Shopify is particularly compelling. You can create/manage stores within an organization and transfer ownership when necessary. Shopify Help Center Shopify Help Center

My recommendation: start with Shopify as your agency standard, and use Shopify Plus for clients that genuinely need enterprise multi-store management. Use BigCommerce when a client's architecture calls for many storefronts sharing one commerce backend.

If you tell me roughly how many stores you manage (e.g. 10, 50, 200) and whether they're independent clients vs. multiple stores per client, I can give you a much more specific agency-stack recommendation, including permissions, dev/staging, cloning, billing, handoff, and deployment workflow.

If you’re an agency building and managing multiple client stores, I’d narrow it to BigCommerce Multi-Storefront vs. Shopify Plus vs. Adobe Commerce.

My pick: BigCommerce for an agency-centric workflow

BigCommerce is probably the best fit if your goal is one agency team managing many distinct client storefronts from a centralized commerce platform.

Its Multi-Storefront setup is explicitly designed around multiple brands/regions/storefronts from one backend. You can manage storefronts, products, customers, orders and analytics centrally, while giving each storefront its own theme, domain, catalog selection, pricing and content. It also supports duplicating an existing storefront as a starting point. BigCommerce

That maps nicely to an agency workflow:

Agency → Client → Storefront(s)
shared operational tooling → client-specific branding/catalog/configuration

How I'd rank them

Shopify Plus is excellent—but there's an important distinction

Shopify Plus gives you an organization containing multiple expansion stores, with centralized users, billing and organization-level administration. Shopify Help Center Shopify Help Center

The catch for your use case is that the stores are still fundamentally independent. Products, collections, inventory and settings aren't automatically synchronized between stores, and apps are billed per store. Shopify Help Center

So Shopify Plus is fantastic if you're saying:

"We have a client with a US store, EU store, B2B store, etc."

It's less compelling if you're saying:

"Our agency has 50 unrelated clients and we want an efficient agency-level operating model."

Adobe Commerce is the power-user option

Adobe Commerce has arguably the strongest underlying multi-store architecture. A single Commerce installation can contain multiple websites → stores → store views, with different domains, catalogs, currencies, languages and configurations. Experience League Experience League

That's extremely powerful for complex enterprise clients.

But I'd be cautious about using it as the default agency platform. As the number of websites/stores grows, Adobe itself warns about catalog/indexing and performance implications. Experience League Experience League

The bigger question for your agency

There's an important distinction between:

A. One client with multiple stores

and

B. An agency operating hundreds of completely independent client stores.

For A, I'd strongly consider Shopify Plus or Adobe Commerce depending on complexity.

For B, I'd lean BigCommerce, but I'd design your agency layer separately from the commerce platform—your own provisioning, client access, templates, deployment/configuration, monitoring, app management, etc.

If you tell me roughly how many stores you expect (10 / 50 / 100+), whether stores are independent clients or multiple stores per client, and whether you're primarily B2C, B2B, or both, I can give you a much more definitive architecture recommendation.

If you’re an agency building and managing multiple independent client stores, I’d rank the main options like this:

My pick: Shopify Plus — if your clients can justify it

Shopify Plus has an actual organization-level model for multiple stores: centralized users, billing, store switching, permissions, and expansion stores. Shopify Help Center Shopify Help Center

That makes it particularly attractive for an agency because you can establish repeatable workflows around:

• Client store creation
• Developer/staging stores
• Theme replication
• Agency staff permissions
• Store switching
• Centralized organization administration
• Handing a completed store over to the client

Plus also supports unlimited staging stores and expansion stores within the Plus organization. Shopify Help Center

The catch: Shopify's expansion-store model isn't really designed for an agency to put dozens of unrelated client brands under one Plus organization. Expansion stores are intended primarily for extensions of the same business/brand; different brands can require separate Plus agreements. Shopify Help Center Shopify Help Center

So I'd use Shopify Plus per client, while your agency operates those client organizations through your Partner/agency workflow.

BigCommerce is the interesting alternative

If what you actually mean is:

"We want to build 5–20 storefronts for a client, potentially different brands/regions, while sharing products, data and backend infrastructure."

Then I'd seriously consider BigCommerce.

Its native Multi-Storefront functionality lets multiple storefronts operate from a single backend, with different branding, domains, pricing, catalogs, currencies, etc. You can manage storefronts, products, customers, orders and analytics centrally. BigCommerce BigCommerce

That's arguably a better architectural fit for multi-store commerce than Shopify when the stores are closely related.

For an agency, I'd make the decision this way

Choose Shopify if:

• You're primarily building DTC stores.
• Clients expect the Shopify ecosystem.
• You want the easiest hiring/training path.
• You want a highly standardized agency delivery process.
• Each client generally has one primary store plus regional/B2B/etc. stores.

Choose BigCommerce if:

• Multi-store is a core requirement rather than an occasional feature.
• Clients have multiple brands, regions, catalogs or customer segments.
• You want multiple storefronts sharing a backend.
• You're comfortable with a somewhat more technical platform.
• You're doing more complex B2B/enterprise commerce.

Choose WooCommerce if:

• Your agency is already heavily invested in WordPress.
• Custom functionality is more important than operational simplicity.
• You have the engineering/DevOps capacity to maintain many WordPress installations.

One important distinction: "manage many independent client stores" and "one client has many storefronts" are different problems. Shopify is excellent at the former when combined with an agency/Partner workflow; BigCommerce is particularly compelling for the latter.

If you tell me roughly how many stores you expect to manage (e.g. 20, 100, 500), average client size, and whether you want one agency admin to jump between every client's store, I can recommend the exact architecture—including Shopify Partner vs Shopify Plus vs BigCommerce, permissions, billing/ownership, staging, and how I'd structure the agency's workflow.

If you’re an agency building and managing multiple client ecommerce stores, I’d separate the decision into two different models:

1. One client has multiple storefronts → BigCommerce is particularly strong.
2. Your agency manages many completely separate client stores → Shopify is generally the better agency ecosystem, but you’ll want to structure access carefully rather than trying to put all clients into one organization.

My recommendation

🥇 I'd choose Shopify for your agency

Shopify has the strongest combination of agency ecosystem, themes, apps, developers, integrations, merchant familiarity, and client handoff.

Shopify's organization tooling also lets stores be managed centrally, with shared users, permissions, billing, and store switching. Shopify Help Center Shopify

For Shopify Plus, expansion stores sit under an organization, giving you centralized organization-level administration while each storefront retains its own configuration. Shopify Help Center

The important caveat for an agency is that separate client businesses shouldn't necessarily be treated as one Shopify organization. Plus expansion stores are primarily designed for stores belonging to the same business/brand structure. Shopify explicitly provides multi-brand agreements for cases that don't fit that model. Shopify Help Center

So I'd architect your agency around:

Agency
→ Client A Shopify store
→ Client B Shopify store
→ Client C Shopify store
→ Client D Shopify store

rather than trying to make the agency itself the owner of one giant multi-client Shopify organization.

That gives you much cleaner ownership, billing, permissions, and eventual client handoff.

🥈 BigCommerce deserves serious consideration

BigCommerce is arguably better if your actual requirement is:

"We want to create 5–20 different storefronts from one underlying ecommerce backend."

Its Multi-Storefront capability lets you manage multiple storefronts from one dashboard, with different branding, domains, currencies, catalogs, pricing, and customer experiences. It also supports unified orders/customers/analytics. BigCommerce BigCommerce

That's excellent for scenarios like:

Client
→ Brand A
→ Brand B
→ US storefront
→ UK storefront
→ B2B storefront

all backed by the same commerce operation.

BigCommerce also explicitly positions Multi-Storefront toward agencies/partners. BigCommerce

The key distinction

If you're saying:

"We're an agency and every client gets their own independent store."

Shopify wins.

If you're saying:

"Our clients frequently need multiple brands/regions/storefronts sharing products, customers, orders, and backend operations."

BigCommerce becomes very compelling.

And if you're building dozens/hundreds of stores from a standardized agency blueprint, I'd also evaluate the operational layer—store provisioning, theme deployment, app installation, Git/version control, permissions, QA, and client handoff—because that can matter more than the ecommerce platform itself.

If you tell me roughly how many stores you expect to manage (e.g. 10, 50, 200+) and whether each client is independent or has multiple brands/stores, I can recommend the exact architecture I'd use for the agency.

If you mean an agency that builds and operates many different client stores, rather than one merchant with multiple brands, I’d separate the question into two workflows:

1. One client → multiple storefronts
2. Agency → many unrelated clients/stores

For #2, Shopify Plus is usually my first choice, but there’s an important caveat: its multi-store features are designed primarily around an organization/merchant, not as a true agency-wide “control every client from one master dashboard” system.

My ranking for an agency

🥇 Shopify Plus — best default for an agency

I'd choose Shopify Plus if your agency is building lots of DTC/ecommerce stores and wants a repeatable delivery model.

The big advantage is that you can standardize your agency around:

• reusable themes/components
• Shopify CLI and Git-based development
• common app/integration patterns
• Shopify Functions/Flow
• Markets and expansion stores
• centralized organization administration
• a large partner/developer ecosystem

For clients that need several stores, Plus can support expansion stores under the same organization. Agencies are also using shared codebase approaches to launch multiple brands quickly—for example, one documented agency implementation launched 12 Shopify Plus stores using a unified codebase. Swanky Appfleece

The catch: don't confuse multi-store for one client with multi-client agency management. If you have 50 unrelated clients, Shopify doesn't magically turn them into one giant agency tenant. You'll still need an internal layer for client/account management, permissions, deployment, monitoring, etc.

🥈 BigCommerce — arguably better if “multi-store” is the core requirement

This is the one I'd seriously consider against Shopify.

BigCommerce's Multi-Storefront is unusually strong: multiple storefronts can be managed from one backend, with separate domains, themes, currencies, products, pricing, customers and orders while retaining centralized administration. BigCommerce BigCommerce

It also explicitly positions Commerce-as-a-Service for organizations providing commerce solutions to customers, which is interesting for an agency/reseller model. BigCommerce

So if your agency frequently gets clients saying:

“We have 5 brands, 12 regions, different catalogs, but want centralized operations.”

I'd put BigCommerce ahead of Shopify.

🥉 Adobe Commerce

I'd only make this your default if your clients are genuinely enterprise and require deep customization, complicated catalogs, ERP integrations, multiple websites/store views, etc.

It's powerful, but you're taking on substantially more implementation and maintenance overhead. For an agency trying to productize store builds, that's often the wrong tradeoff.

What I'd actually build as an agency

If you're doing, say, 20–100 client stores, I'd architect your agency around:

Shopify Plus + your own agency management layer

rather than looking for a platform that tries to be the agency's entire control plane.

Something like:

                    YOUR AGENCY
                         │
              ┌──────────┴──────────┐
              │   Agency Control    │
              │      Plane          │
              │                     │
              │ Clients             │
              │ Projects            │
              │ Environments        │
              │ Deployments         │
              │ Access/permissions  │
              │ Monitoring          │
              └──────────┬──────────┘
                         │
          ┌──────────────┼──────────────┐
          ▼              ▼              ▼
      Client A        Client B       Client C
      Shopify         Shopify        Shopify
        Plus            Plus           Plus
       Stores          Stores         Stores

That gives you standardization without mixing client data.

If, however, your business model is closer to “we provision hundreds of stores from a common platform and operate them centrally”, I'd investigate BigCommerce Multi-Storefront/CaaS much more seriously.

Bottom line:

• Most agency builds: Shopify Plus
• Lots of multi-brand/multi-region stores per client: BigCommerce
• Extreme enterprise customization: Adobe Commerce
• Maximum ownership/control: WooCommerce

If you tell me roughly how many client stores you manage (10 / 50 / 500+) and whether each client needs one store or multiple stores, I can give you a much more specific architecture recommendation—including how you'd handle client access, Git/deployments, reusable themes, staging, billing, and store provisioning.

This is the one I'd seriously consider against Shopify.

BigCommerce's Multi-Storefront is unusually strong: multiple storefronts can be managed from one backend, with separate domains, themes, currencies, products, pricing, customers and orders while retaining centralized administration. BigCommerce BigCommerce

It also explicitly positions Commerce-as-a-Service for organizations providing commerce solutions to customers, which is interesting for an agency/reseller model. BigCommerce

So if your agency frequently gets clients saying:

“We have 5 brands, 12 regions, different catalogs, but want centralized operations.”

I'd put BigCommerce ahead of Shopify.

🥉 Adobe Commerce

I'd only make this your default if your clients are genuinely enterprise and require deep customization, complicated catalogs, ERP integrations, multiple websites/store views, etc.

It's powerful, but you're taking on substantially more implementation and maintenance overhead. For an agency trying to productize store builds, that's often the wrong tradeoff.

What I'd actually build as an agency

If you're doing, say, 20–100 client stores, I'd architect your agency around:

Shopify Plus + your own agency management layer

rather than looking for a platform that tries to be the agency's entire control plane.

Something like:

                    YOUR AGENCY
                         │
              ┌──────────┴──────────┐
              │   Agency Control    │
              │      Plane          │
              │                     │
              │ Clients             │
              │ Projects            │
              │ Environments        │
              │ Deployments         │
              │ Access/permissions  │
              │ Monitoring          │
              └──────────┬──────────┘
                         │
          ┌──────────────┼──────────────┐
          ▼              ▼              ▼
      Client A        Client B       Client C
      Shopify         Shopify        Shopify
        Plus            Plus           Plus
       Stores          Stores         Stores

That gives you standardization without mixing client data.

If, however, your business model is closer to “we provision hundreds of stores from a common platform and operate them centrally”, I'd investigate BigCommerce Multi-Storefront/CaaS much more seriously.

Bottom line:

• Most agency builds: Shopify Plus
• Lots of multi-brand/multi-region stores per client: BigCommerce
• Extreme enterprise customization: Adobe Commerce
• Maximum ownership/control: WooCommerce

If you tell me roughly how many client stores you manage (10 / 50 / 500+) and whether each client needs one store or multiple stores, I can give you a much more specific architecture recommendation—including how you'd handle client access, Git/deployments, reusable themes, staging, billing, and store provisioning.

If you're an agency building and maintaining stores for multiple clients, I’d separate the question into two models:

1. One client has multiple storefronts/brands → BigCommerce or Shopify Plus.
2. Your agency manages many independent client stores → Shopify is usually the better agency workflow.

My recommendation: Shopify

For an agency, Shopify is probably the best default.

The important distinction is that you aren't trying to put all your clients into one Shopify organization. Instead, your agency uses the Shopify Partner ecosystem + Partner Dashboard + development stores, while each client ultimately owns their own store.

Shopify's store switcher lets users with access to multiple stores quickly search and switch between them. Shopify Help Center Shopify also supports organizations, centralized users/permissions, and multi-store management for merchants that actually own multiple stores. Shopify Help Center Shopify Help Center

For your agency workflow, I'd structure it roughly:

Agency
→ Shopify Partner account
→ Client A
→ Client B
→ Client C
→ Client D
→ etc.

Each client gets an independent store, billing, apps, data, and ownership, while your team retains the appropriate collaborator/partner access.

Where BigCommerce gets interesting

BigCommerce is arguably stronger if your clients specifically need multiple storefronts under one commerce backend.

Its Multi-Storefront system lets a merchant operate multiple distinct storefronts from one account, with shared catalog/order/customer infrastructure and storefront-specific branding, domains, currencies, pricing, etc. BigCommerce BigCommerce

So I'd think of it this way:

The big caveat: Shopify Plus

If you're targeting larger clients, Shopify Plus becomes particularly compelling. Plus organizations have expansion stores, centralized billing, organization-level roles/permissions, store-copy capabilities, and multi-store analytics. Shopify Help Center

That's very different from the workflow of a normal Shopify client.

For example, an enterprise client might have:

Client X — Shopify Plus organization

• US store
• Canada store
• UK store
• EU store
• Outlet store
• B2B store

All within their Plus organization.

Meanwhile, your agency can have dozens of completely separate clients, each with their own Shopify stores.

What I'd choose for an agency

If you're building a repeatable agency operation, I'd go:

Shopify + Shopify Partner account + standardized themes/components + development stores + Git-based theme workflow + a standardized app/integration stack.

Then make a distinction between:

• Agency-level management — your team, permissions, development stores, client access, deployments.
• Client-level management — each client's production store and data.
• Enterprise multi-store — Shopify Plus when the client themselves needs multiple stores.

I would not choose a platform primarily because it lets you put all client stores into one admin. That's actually undesirable from a security, ownership, billing, and client-offboarding perspective.

If you tell me roughly how many stores you manage (e.g. 10, 50, 200+) and whether they're mostly Shopify/DTC, B2B, or WooCommerce clients, I can give you a much more specific agency tech-stack recommendation, including how I'd handle provisioning, permissions, staging, deployments, reusable themes, apps, and client handoff. shopify.com

BigCommerce is arguably stronger if your clients specifically need multiple storefronts under one commerce backend.

Its Multi-Storefront system lets a merchant operate multiple distinct storefronts from one account, with shared catalog/order/customer infrastructure and storefront-specific branding, domains, currencies, pricing, etc.

So I'd think of it this way:

If you’re an agency building and managing stores for multiple clients, I’d separate the question into two models:

1. One client = multiple storefronts/brands → multi-store platform matters most.
2. Your agency = managing many completely separate client businesses → agency account/workspace management matters more than native multi-store.

My shortlist

🥇 My default choice: Shopify Plus

For an agency, Shopify Plus is probably the best overall workflow if your clients have the budget.

Plus gives an organization-level structure with centralized users, billing, store navigation, advanced permissions, store copying, and multi-store analytics. Shopify Help Center Shopify

The important caveat is that Plus expansion stores are still independent stores: products, inventory, collections, settings, etc. aren't automatically synchronized between them. Shopify Help Center

So I'd use Shopify Plus when you're building things like:

• Client A → US / UK / EU stores
• Client B → multiple brands
• Client C → B2C + B2B stores
• Client D → regional storefronts

It's particularly attractive when your agency wants a repeatable "build → duplicate → customize → launch" process.

🥈 BigCommerce may actually be better for true multi-store clients

BigCommerce Multi-Storefront is worth serious consideration if your clients frequently want several storefronts managed from one backend.

It explicitly supports multiple storefronts from a single dashboard, including different domains, currencies, catalogs, pricing, themes, customers and orders. It also supports duplicating an existing storefront as a starting point. BigCommerce

That makes the workflow potentially cleaner for an agency building a family of stores:

master storefront → duplicate → customize → launch → centrally monitor

I'd lean BigCommerce over Shopify when the same client routinely needs lots of distinct storefronts rather than simply one primary store.

🥉 Adobe Commerce if you're doing enterprise custom work

Adobe Commerce has arguably the deepest native multi-site architecture. A single installation can contain multiple websites → stores → store views, with different domains, catalogs, currencies, pricing and configurations. Experience League Experience League

But there's a catch for an agency: the complexity is substantially higher. Adobe itself notes that adding many websites/stores can increase indexing time, configuration overhead and performance requirements. Experience League Experience League

I'd choose it when your agency has dedicated developers/DevOps and clients need sophisticated enterprise customization—not simply because "multi-store" sounds attractive.

The bigger question for your agency

If by "multiple client stores" you mean something like:

We want one agency account where our team can see all 50 client stores, switch between them, control permissions, reuse themes/components, deploy updates, and keep client data isolated.

Then I would not automatically choose based on native multi-store alone.

I'd probably architect around:

Shopify Plus / BigCommerce + your agency's own management layer

rather than trying to put all clients into one giant ecommerce installation.

If you tell me roughly how many stores you expect (10 / 50 / 500+), whether they're Shopify-like SMB clients or enterprise clients, and whether you need one-click cloning/theme deployment across clients, I can give you a much more definitive recommendation—including the best architecture for the agency itself.

If you're an agency building and maintaining many independent client stores, I'd rank the options:

My pick: Shopify

For an agency, Shopify is probably the best overall workflow, particularly if each client owns their own independent store.

Shopify's current Partner setup is unusually well aligned with an agency model. The Dev Dashboard puts your dev stores, client-transfer stores, and collaborator stores in one place. Shopify Help Center Shopify

You also get:

• Client-specific access through collaborator accounts rather than sharing credentials. Shopify Help Center
• Agency-level roles and permissions, including organization admins, store admins, user admins, and custom roles. Shopify Help Center Shopify Help Center
• Ability to scope a team member's access to specific stores or all current/future stores. Shopify Help Center
• A clean workflow for building → QA → client handoff → ongoing maintenance.
• Clients can own their stores while your agency retains collaborator access, which is much cleaner operationally than having all client stores owned by the agency.

Shopify specifically describes the Partner system as a place to build stores for clients, transfer them, and maintain ongoing collaborations. Shopify Help Center Shopify Help Center

shopify.com

One important distinction

If by "multi-store management" you mean:

"We have 50 clients, each with their own completely separate Shopify store."

Shopify wins.

If you mean:

"Client X has 10 brands/regions/storefronts, and we want to operate all 10 from one backend."

Then I'd seriously consider BigCommerce. Its Multi-Storefront system is explicitly designed around multiple storefronts sharing one backend, with centralized products, orders, customers, analytics, pricing, domains, etc. BigCommerce

bigcommerce.com

And if you're building large, highly customized enterprise commerce estates, Adobe Commerce is the more powerful option: one Commerce installation can manage multiple websites, stores and store views with different domains, catalogs, currencies, languages, etc. Experience League Experience League The tradeoff is substantially more technical/operational complexity.

business.adobe.com

What I'd choose for an agency

Default stack: Shopify + Shopify Partners

I'd structure the agency around:

Agency organization → team roles → client stores → collaborator access → reusable themes/components → standardized deployment/QA → client handoff

That gives you a much better operating model than trying to create one giant "agency account" containing all clients' commerce data.

If you tell me roughly how many stores you manage (10 / 50 / 500+), whether stores are independent or grouped by client, and whether you need one-click cloning/syncing of themes/products/settings, I can give you a much more specific recommendation—including Shopify vs BigCommerce vs Adobe vs a headless setup for your agency.

For an agency building and managing multiple client stores, the “best” platform depends on whether you mean:

1. Your agency needs to manage many independent client accounts efficiently, or
2. One client needs multiple storefronts/brands under one commerce backend.

Those are very different workflows.

Best overall for agencies: Shopify / Shopify Plus

For most ecommerce agencies, Shopify is usually the strongest operational choice because the agency workflow is mature:

• Partner dashboard for managing many client stores
• Development stores for building before handoff
• Huge app ecosystem
• Easier client onboarding/offboarding
• Large talent pool for contractors and developers
• Strong client familiarity (less training burden)

shopify.com

Best fit:

• DTC brands
• Fashion, beauty, food, lifestyle
• Agencies launching many stores per year
• Clients who need speed over deep enterprise customization

Weakness: each client store is usually its own Shopify instance. Managing 50+ stores means you need your own agency tooling, SOPs, reporting stack, and access management.

Best for true multi-store operations: BigCommerce Enterprise

If you mean “one backend managing many storefronts,” BigCommerce is arguably stronger.

Its Multi-Storefront capability is designed for managing multiple brands, regions, or customer segments from one control panel. BigCommerce BigCommerce

Advantages:

• Multiple storefronts from one backend
• Shared catalog/product management
• Centralized reporting
• Different themes/domains/catalog visibility per storefront
• Strong B2B capabilities

bigcommerce.com

Best fit:

• Franchise networks
• Enterprise clients with multiple brands
• International stores
• B2B + B2C companies

Weakness: smaller ecosystem than Shopify, and fewer small-business clients already know the platform.

Best for large enterprise agency builds: Adobe Commerce

Adobe Commerce is powerful for complex multi-site deployments:

Good when clients need:

• Custom pricing logic
• Complex catalogs
• Multiple regions/stores
• Heavy ERP integrations
• Full control over infrastructure

Weakness: much higher development and maintenance overhead.

Best agency stack by client type

For an agency specifically, I would usually build around:

Option A — Most agencies

Shopify Partner ecosystem + internal agency tooling

Example workflow:

• Shopify Partner account
• Standardized themes
• Reusable sections/components
• Shared app stack
• Agency QA checklist
• Client reporting dashboard

Option B — Enterprise multi-store agency

BigCommerce Enterprise + headless capability

Better when your agency sells “we operate your commerce ecosystem” rather than “we build your store.”

My default recommendation:

• Building 5–100 separate client stores/year → Shopify
• Managing portfolios of stores for the same enterprise client → BigCommerce
• Serving enterprise clients with complex commerce rules → Adobe Commerce or headless

If you tell me roughly how many stores you manage (10, 50, 500+), whether they are separate clients or one client with many brands, and whether you need white-label client dashboards, I can narrow it down.

If you're an agency building and operating multiple client stores, I’d separate “multi-store” into two very different models:

1. One client/brand with multiple storefronts → one backend managing several sites.
2. Your agency managing many completely independent client stores → you need strong agency access, permissions, duplication, deployment, and operational workflows.

For the second model, Shopify Plus is probably the best overall fit.

My ranking for an agency

🥇 Shopify Plus — my recommendation

For an agency, the big advantage is that Shopify Plus gives you an organization-level layer above individual stores. You can manage multiple stores, users, billing, permissions, and organization-level administration from the same environment. Shopify Help Center Shopify Help Center

Expansion stores can also be created from an existing store, with Shopify allowing you to import things like themes, products, collections, and files when creating the new store. Shopify Help Center

That maps extremely well to an agency workflow like:

Agency → Client → Store(s) → Development → Production → Ongoing management

The important caveat: Shopify stores remain independent at the data/configuration level. Products, inventory, settings, etc. aren't automatically synchronized between stores. Shopify Help Center

That's actually often desirable for an agency because Client A's store shouldn't accidentally affect Client B's store.

help.shopify.com

🥈 BigCommerce — potentially even better for true multi-storefront

I'd seriously evaluate BigCommerce if your agency wants a model where one backend can operate several storefronts that are part of the same commerce operation.

BigCommerce's Multi-Storefront functionality is designed around multiple brands, regions, or customer segments from one backend. It lets you create/manage storefronts, determine which products appear on which storefronts, manage customers/orders, and see analytics across storefronts. BigCommerce

This is particularly attractive if your typical client says:

"We have one catalog, but we need 5 different branded storefronts."

Shopify Plus is better when you're thinking multiple independent stores under an organization.

BigCommerce is especially compelling when you're thinking one commerce backend → many storefront experiences.

bigcommerce.com

🥉 Adobe Commerce — powerful, but I'd only choose it for the right clients

Adobe Commerce has arguably the most sophisticated native multi-site architecture.

A single installation can contain multiple websites → stores → store views, with different domains, catalogs, currencies, languages, pricing, etc. Experience League Experience League

That makes it excellent for enterprise clients where you need something like:

Commerce instance
│
├── Brand A
│   ├── US
│   ├── UK
│   └── EU
│
├── Brand B
│   ├── US
│   └── EU
│
└── Brand C
    └── US

But there's a downside for an agency: operational complexity. Adobe explicitly notes that increasing the number of websites/stores can increase catalog/indexing/configuration overhead and affect performance. Experience League

I'd choose it when your clients have enterprise-level requirements—not simply because you need to manage lots of stores.

What I'd build as an agency

If your agency expects to build, say, 20–100+ stores, I'd strongly lean toward:

Shopify Plus + an agency-specific operating layer

rather than trying to put all clients into one giant multi-store installation.

Something like:

                    AGENCY
                       │
          ┌────────────┴────────────┐
          │                         │
       CLIENT A                  CLIENT B
          │                         │
    ┌─────┴─────┐             ┌─────┴─────┐
    │            │             │           │
   Dev        Production      Dev      Production
    │            │             │           │
   Store        Store          Store       Store

Then standardize:

• Store templates
• Theme architecture
• App stack
• Shopify CLI/Git workflow
• Client permissions
• Agency permissions
• Development/staging process
• Launch checklist
• Automated QA
• Analytics/pixels
• Deployment process
• Backup/export process
• Client handoff process

The real competitive advantage isn't merely having a platform that supports multiple stores. It's having a repeatable "factory" for launching stores.

One important question

If you tell me roughly how your agency operates—e.g. “we build 30 Shopify stores a year, each client owns their store” versus “we build 10 brands with 5–20 storefronts each”—I can recommend the exact architecture and platform, including how I'd structure agency accounts, client ownership, dev stores, Git, templates, permissions, and billing.

That maps extremely well to an agency workflow like:

Agency → Client → Store(s) → Development → Production → Ongoing management

The important caveat: Shopify stores remain independent at the data/configuration level. Products, inventory, settings, etc. aren't automatically synchronized between stores. Shopify Help Center

That's actually often desirable for an agency because Client A's store shouldn't accidentally affect Client B's store.

help.shopify.com

🥈 BigCommerce — potentially even better for true multi-storefront

I'd seriously evaluate BigCommerce if your agency wants a model where one backend can operate several storefronts that are part of the same commerce operation.

BigCommerce's Multi-Storefront functionality is designed around multiple brands, regions, or customer segments from one backend. It lets you create/manage storefronts, determine which products appear on which storefronts, manage customers/orders, and see analytics across storefronts. BigCommerce

This is particularly attractive if your typical client says:

"We have one catalog, but we need 5 different branded storefronts."

Shopify Plus is better when you're thinking multiple independent stores under an organization.

BigCommerce is especially compelling when you're thinking one commerce backend → many storefront experiences.

bigcommerce.com

🥉 Adobe Commerce — powerful, but I'd only choose it for the right clients

Adobe Commerce has arguably the most sophisticated native multi-site architecture.

A single installation can contain multiple websites → stores → store views, with different domains, catalogs, currencies, languages, pricing, etc. Experience League Experience League

That makes it excellent for enterprise clients where you need something like:

Commerce instance
│
├── Brand A
│   ├── US
│   ├── UK
│   └── EU
│
├── Brand B
│   ├── US
│   └── EU
│
└── Brand C
    └── US

But there's a downside for an agency: operational complexity. Adobe explicitly notes that increasing the number of websites/stores can increase catalog/indexing/configuration overhead and affect performance. Experience League

I'd choose it when your clients have enterprise-level requirements—not simply because you need to manage lots of stores.

What I'd build as an agency

If your agency expects to build, say, 20–100+ stores, I'd strongly lean toward:

Shopify Plus + an agency-specific operating layer

rather than trying to put all clients into one giant multi-store installation.

Something like:

                    AGENCY
                       │
          ┌────────────┴────────────┐
          │                         │
       CLIENT A                  CLIENT B
          │                         │
    ┌─────┴─────┐             ┌─────┴─────┐
    │            │             │           │
   Dev        Production      Dev      Production
    │            │             │           │
   Store        Store          Store       Store

Then standardize:

• Store templates
• Theme architecture
• App stack
• Shopify CLI/Git workflow
• Client permissions
• Agency permissions
• Development/staging process
• Launch checklist
• Automated QA
• Analytics/pixels
• Deployment process
• Backup/export process
• Client handoff process

The real competitive advantage isn't merely having a platform that supports multiple stores. It's having a repeatable "factory" for launching stores.

One important question

If you tell me roughly how your agency operates—e.g. “we build 30 Shopify stores a year, each client owns their store” versus “we build 10 brands with 5–20 storefronts each”—I can recommend the exact architecture and platform, including how I'd structure agency accounts, client ownership, dev stores, Git, templates, permissions, and billing.

If you're an agency building and maintaining multiple separate client stores, I’d lean Shopify—specifically the Shopify Partner + Dev Dashboard workflow, with Shopify Plus for larger clients.

My ranking for an agency

🥇 Shopify — best overall for your use case

The important distinction is "multiple client stores" vs. "multiple storefronts for one client."

For an agency, Shopify's Partner ecosystem is unusually well suited to the former. Your team can manage dev stores, client-transfer stores, and collaborator stores from the Dev Dashboard, while organization-level roles let you manage your agency's users and permissions. Shopify Shopify Help Center

The 2026 improvements are particularly relevant: Shopify now has Partner Organizations, RBAC, and a unified view of your stores in Dev Dashboard. You can scope Store Admin access to specific stores or all current/future stores. Shopify Shopify Help Center

That gives you a workflow roughly like:

Agency
→ Developer / Designer / PM roles
→ Client A store
→ Client B store
→ Client C store
→ Client D store

And when a build is complete, you can transfer the store to the client while continuing to work through collaborator access. Shopify Help Center Shopify Help Center

That's a very natural agency operating model.

shopify.com

🥈 BigCommerce — potentially better if you mean "one backend, many stores"

BigCommerce becomes more interesting if your requirement is actually:

"We want to operate multiple branded storefronts from a shared commerce backend."

Its Multi-Storefront system is designed specifically for multiple brands, regions, domains, catalogs and customer segments. Products, orders, customers and analytics can be managed centrally, while storefronts can have different themes, pricing, currencies, domains, etc. BigCommerce BigCommerce

That's excellent for something like:

Client company
→ Brand A
→ Brand B
→ US store
→ EU store
→ B2B store

rather than:

Agency
→ Client A
→ Client B
→ Client C
→ Client D

bigcommerce.com

The key decision

I'd use this rule:

• 100 independent clients, each with their own store → Shopify
• One client with 5–20 storefronts/brands/regions → BigCommerce or Shopify Plus
• Large enterprise client with many Shopify stores → Shopify Plus
• Highly custom commerce infrastructure → BigCommerce / Adobe Commerce
• Agency wants the easiest developer ecosystem + hiring + apps + client handoff → Shopify

Shopify Plus also has expansion stores, centralized organization management, billing, users, and multi-store analytics. Shopify Help Center Shopify Help Center

For an agency, I'd choose Shopify unless your defining requirement is centralized multi-storefront commerce for the same merchant.

If you tell me roughly how many stores you expect (10 / 50 / 500+) and whether each client owns their own Shopify account, I can lay out the ideal agency architecture, permissions, store creation → development → QA → handoff workflow, including which Shopify plan(s) make sense.

The 2026 improvements are particularly relevant: Shopify now has Partner Organizations, RBAC, and a unified view of your stores in Dev Dashboard. You can scope Store Admin access to specific stores or all current/future stores. Shopify Shopify Help Center

That gives you a workflow roughly like:

Agency
→ Developer / Designer / PM roles
→ Client A store
→ Client B store
→ Client C store
→ Client D store

And when a build is complete, you can transfer the store to the client while continuing to work through collaborator access. Shopify Help Center Shopify Help Center

That's a very natural agency operating model.

shopify.com

🥈 BigCommerce — potentially better if you mean "one backend, many stores"

BigCommerce becomes more interesting if your requirement is actually:

"We want to operate multiple branded storefronts from a shared commerce backend."

Its Multi-Storefront system is designed specifically for multiple brands, regions, domains, catalogs and customer segments. Products, orders, customers and analytics can be managed centrally, while storefronts can have different themes, pricing, currencies, domains, etc.

That's excellent for something like:

Client company
→ Brand A
→ Brand B
→ US store
→ EU store
→ B2B store

rather than:

Agency
→ Client A
→ Client B
→ Client C
→ Client D

If you’re an agency building and maintaining multiple client stores, I’d narrow the choice to Shopify Plus vs. BigCommerce Multi-Storefront, with Adobe Commerce being the more technical/enterprise option.

My recommendation: Shopify Plus

For an agency workflow, Shopify Plus is usually the best overall fit if each client needs their own independent storefront.

Shopify Plus supports expansion stores under one organization/contract, with centralized organization-level management for users and billing. Each store can still have its own settings, configuration, and storefront. Shopify Help Center Shopify Help Center

That makes the model roughly:

Agency → Client account/store → Client's storefront

rather than trying to cram unrelated clients into one giant multi-store installation.

Where BigCommerce gets interesting

BigCommerce Multi-Storefront is arguably stronger if your agency wants one backend managing multiple storefronts that share operational data.

BigCommerce explicitly supports multiple brands/regions/storefronts from one control panel, including managing products, orders, customers, storefront analytics, pricing, domains, and storefront-specific customization. It can also duplicate an existing storefront as a starting point. BigCommerce

So I'd think of it this way:

Adobe Commerce

Adobe Commerce is extremely capable for true multi-site architectures. One installation can contain multiple websites → stores → store views, with different domains, catalogs, currencies, languages, pricing, etc. Experience League Experience League

But I wouldn't choose it simply because you're an agency with lots of clients. It introduces substantially more infrastructure, deployment, configuration, and performance considerations. Adobe itself notes that increasing the number of websites/stores can increase indexing and configuration overhead. Experience League

It's much more compelling when a single enterprise client has multiple brands, countries, catalogs, or complex B2B requirements.

The important distinction for your agency

There are actually two different "multi-store" problems:

A. Agency portfolio

Your Agency
├── Client A → Store A
├── Client B → Store B
├── Client C → Store C
└── Client D → Store D

For this, I'd choose Shopify Plus.

B. One client with many storefronts

Client
└── One commerce backend
    ├── Brand A
    ├── Brand B
    ├── US Store
    ├── EU Store
    └── B2B Store

For this, BigCommerce Multi-Storefront or Adobe Commerce becomes more interesting.

One caveat

If by "multi-store management" you mean you want your agency to have one dashboard where your staff can log into 50–200 completely unrelated client Shopify stores, switch between them, deploy themes/apps, monitor orders, and manage permissions, that's a different requirement from Shopify's native multi-store organization model.

In that scenario, I'd design the agency stack around a central agency operations layer + individual client stores, rather than trying to make the ecommerce platform itself the agency management system.

If you tell me roughly how many stores you expect (e.g. 10, 50, 500), whether clients own the stores, and whether you want shared catalogs/data or complete isolation, I can give you a much more definitive architecture recommendation.

For an agency building multiple client stores, the “best” platform depends on whether you mean:

1. You need to manage many independent client accounts efficiently (agency workflow), or
2. You need one merchant with many storefronts/brands (true multi-store).

Those are different problems.

Best overall for agencies: Shopify + Shopify Partner workflow

For most ecommerce agencies, Shopify is usually the strongest operating model because you can:

• Create unlimited development stores for client builds
• Transfer ownership to clients at launch
• Manage many client relationships through the Partner ecosystem
• Use the largest app/theme ecosystem
• Hire developers/designers easily because the talent pool is huge

shopify.com

Best fit:

• DTC brands
• Small-to-mid market clients
• Fast launches
• Retainer-based agency work
• Stores needing lots of third-party integrations

Weakness: if you are trying to operate 20+ highly related brands from one backend, Shopify is less elegant because many “multi-store” scenarios require separate stores and additional tooling. On Tap Group

Best for true multi-store management: BigCommerce Enterprise

If your agency specializes in clients that have:

• Multiple brands
• Multiple regions
• Shared catalogs
• Different storefronts from one backend
• Complex B2B/B2C setups

BigCommerce is arguably stronger because of its native Multi-Storefront architecture. It lets merchants manage multiple storefronts from one platform instance with shared administration, catalogs, and reporting capabilities. BigCommerce BigCommerce

Best fit:

• Franchise groups
• Multi-brand retailers
• International commerce
• B2B clients
• Enterprise accounts

Weakness: smaller ecosystem and fewer developers compared with Shopify.

Other platforms worth considering

Adobe Commerce (Magento)

Best when clients have:

• Very complex catalogs
• ERP integrations
• Custom workflows
• Large internal engineering teams

Downside: heavier implementations and higher maintenance.

WooCommerce

Best when:

• Clients already use WordPress
• Budgets are smaller
• Content marketing is central

Downside: managing dozens of WooCommerce installs can become a maintenance burden.

My recommendation for an agency stack

If I were designing an agency operating model:

A common winning setup is:

• Shopify as your default platform
• BigCommerce as your enterprise/multi-store offering
• Standardized themes/components
• Shared QA checklist
• Reusable integrations
• Central client reporting

The biggest operational advantage usually comes less from the platform and more from creating a repeatable agency deployment system.

If you’re building dozens of stores per year, I’d lean Shopify. If you’re building a handful of complex multi-brand ecosystems, I’d lean BigCommerce. checkcharm.com BigCommerce

For an agency building and managing multiple client stores, the “best” platform is usually the one that optimizes agency operations (repeatable builds, client handoff, permissions, maintenance, billing, integrations), not just storefront features.

My shortlist would be:

1. Shopify Plus — best default choice for most agencies

shopify.com

Best for: agencies building many DTC, retail, and mid-market stores.

Why agencies like it:

• Fast launches with reusable themes, sections, apps, and development workflows
• Huge merchant ecosystem, making client onboarding easier
• Low infrastructure burden (hosting, security, upgrades handled by Shopify)
• Good partner ecosystem and collaboration tooling
• Easier for clients to take over day-to-day operations after launch

Weaknesses:

• Multiple completely independent client stores are still separate environments
• Complex shared catalogs, unusual pricing rules, or deep ERP workflows can require workarounds
• Multi-brand architectures can become messy if every brand needs different logic ose.com.au

For an agency model like “we launch 20–100 stores per year,” Shopify is usually the operational winner.

2. BigCommerce — strong if you build B2B or need native multi-storefront

bigcommerce.com

Best for: agencies serving wholesalers, manufacturers, and more complex merchants.

Advantages:

• Native multi-storefront capabilities
• Strong APIs
• Good B2B features
• More flexibility than many SaaS competitors without going fully custom 1Digital® Agency Imaginaire

Tradeoffs:

• Smaller ecosystem than Shopify
• Fewer clients are already familiar with it
• Agency talent pool is smaller

If your agency niche is B2B ecommerce, BigCommerce deserves serious consideration.

3. Adobe Commerce (Magento) — best for enterprise multi-brand groups

business.adobe.com

Best for: agencies managing complex enterprise ecosystems.

Advantages:

• True multi-store architecture
• Multiple brands, catalogs, pricing models, and regional stores from one platform
• Very deep customization possibilities ose.com.au

Tradeoffs:

• Higher development and maintenance overhead
• Requires stronger technical teams
• Slower client onboarding

I would choose this if your clients are asking for:

• multiple brands under one parent company
• shared customer/account systems
• complex B2B pricing
• ERP-heavy workflows

Agency workflow comparison

My recommendation for an agency

A practical stack would be:

• 80% of clients: Shopify / Shopify Plus
• 15% of clients: BigCommerce (B2B-heavy)
• 5% of clients: Adobe Commerce (enterprise complexity)

Then build your agency infrastructure around:

• reusable Shopify theme framework
• standard app stack
• QA checklist
• deployment process
• client onboarding templates
• centralized reporting/dashboarding

The biggest mistake agencies make is choosing a platform that is technically powerful but makes every client project a custom snowflake.

If you tell me:

1. how many stores you expect to manage (10, 50, 500+),
2. whether they are mostly DTC, B2B, or marketplaces, and
3. whether clients need separate admins or a central agency dashboard,

I can narrow this down to a specific architecture.

The biggest mistake agencies make is choosing a platform that is technically powerful but makes every client project a custom snowflake.

If you tell me:

1. how many stores you expect to manage (10, 50, 500+),
2. whether they are mostly DTC, B2B, or marketplaces, and
3. whether clients need separate admins or a central agency dashboard,

I can narrow this down to a specific architecture.

If you're an agency building and operating stores for multiple clients, I'd separate two use cases:

1. One client has multiple storefronts → BigCommerce Multi-Storefront is very compelling.
2. Your agency owns/works across many completely separate client stores → Shopify is usually the better agency ecosystem, but Shopify Plus becomes the strongest choice when centralized multi-store administration is important.

My recommendation

For most agencies: Shopify + Shopify Partners, with Shopify Plus for larger multi-store clients.

Why:

• Strong agency ecosystem: huge app/theme/developer ecosystem and lots of clients already asking for Shopify.
• Good client handoff: each client can have their own store ownership while your agency retains collaborator access.
• Shopify Plus organization management: Plus lets you manage multiple stores under an organization, with centralized users, permissions, billing, store navigation, and organization-level analytics. Shopify Help Center Shopify Help Center
• Store cloning/launch workflow: Plus expansion stores can be created from an existing store and can copy themes, products, collections, and files when creating the new store. Shopify Help Center
• Familiarity: hiring developers, finding apps, and taking over existing client stores is generally easier.

One important caveat: Shopify Plus's multi-store organization isn't really a "master agency dashboard for all your unrelated clients." Expansion stores are intended to belong to the same organization/contract, and the stores remain operationally independent—products, inventory, settings, etc. aren't automatically synchronized. Shopify Help Center

Where BigCommerce gets interesting

BigCommerce is arguably better if your agency's core proposition is "we build lots of storefronts from a common commerce backend."

Its native Multi-Storefront functionality lets you run multiple distinct storefronts from one BigCommerce account, with different branding, domains, currencies, pricing, categories, and customer experiences. You can manage products, orders, customers and analytics centrally. BigCommerce BigCommerce

That's a fundamentally different model from Shopify:

The key distinction I'd use for your agency

If your workflow looks like:

Client A → separate store
Client B → separate store
Client C → separate store
Client D → separate store

I'd pick Shopify. You're really managing a portfolio of independent businesses, rather than one multi-store business.

If it looks like:

One client → Brand A + Brand B + US + UK + B2B + wholesale + several niche storefronts

I'd strongly consider BigCommerce Multi-Storefront, because the platform is explicitly designed around this architecture. BigCommerce

One more option worth considering

If you're building 50–500+ stores from standardized templates, I wouldn't choose solely based on the ecommerce platform. I'd build an agency operating layer around it: reusable themes/components, automated provisioning, Git-based deployment, standardized app stack, QA, analytics, and client permissions.

At that scale, the question becomes less "which platform has multi-store?" and more "which platform lets us industrialize store production without creating an operational nightmare?"

For that specific agency model, I'd shortlist Shopify Plus vs BigCommerce and make the decision based on whether your stores are independent clients or multiple storefronts belonging to the same commerce organization.

If you’re an agency building and maintaining multiple independent client stores, I’d put Shopify first, with BigCommerce as the main alternative.

The key distinction is: “multiple stores for multiple clients” is different from “multiple storefronts for one merchant.”

My ranking for an agency

🥇 Shopify — best overall for your workflow

For an agency, Shopify's ecosystem is unusually well suited to build → collaborate → maintain → hand off → repeat.

As of 2026, Shopify has substantially improved the Partner workflow: its Dev Dashboard now puts development stores, client-transfer stores, and collaborator stores in one place, while Partner Organizations provide centralized team management and role-based access. Shopify Shopify Help Center

That means your agency can have something like:

Agency Organization

• Developer A → access to assigned stores
• Designer B → theme/store access
• Account Manager → client stores
• Senior Developer → all stores
• Client → their own store after handoff

Shopify's partner roles can also be scoped to specific stores or all current/future stores, which is particularly useful once you have a sizeable team. Shopify Help Center Shopify Help Center

And for actual client work, collaborator relationships let your team access client stores without needing to manage a separate password/account for every merchant. Shopify Help Center

I'd choose Shopify if your agency is primarily doing:

• DTC/ecommerce brands
• Standard-to-moderately-custom stores
• Theme development
• Shopify apps/integrations
• Ongoing retainers
• Lots of different clients
• Frequent store launches and handoffs

shopify.com

🥈 BigCommerce — potentially better if clients need sophisticated multi-storefront setups

There's an important nuance here.

BigCommerce's Multi-Storefront is extremely strong: multiple storefronts can share a backend/catalog while having different branding, domains, pricing, categories, currencies, etc. BigCommerce BigCommerce

So if your typical client says:

"We have 5 brands, 12 countries, separate pricing, and different storefront experiences, but want one operational backend."

I'd seriously consider BigCommerce over Shopify.

BigCommerce also explicitly positions its partner ecosystem around agencies and provides sandbox/staging capabilities and Multi-Storefront support. BigCommerce

bigcommerce.com

The important architectural distinction

I'd decide based on which of these describes your agency:

A. 50 clients × 1 store each

→ Shopify is my recommendation.

You want excellent agency access, client permissions, development stores, handoff, apps, themes, and a mature ecosystem.

B. 10 clients × 5–20 storefronts each

→ BigCommerce becomes much more interesting.

You may benefit from its native Multi-Storefront architecture, where multiple sites can be managed from one backend. BigCommerce

C. Enterprise clients with many Shopify stores

→ Shopify Plus.

Shopify Plus provides organization-level management for multiple stores, including store switching, centralized users/billing, and expansion stores. Shopify Help Center Shopify Help Center

What I'd build for an agency

If you're starting an agency platform today, I'd probably standardize on:

Shopify + Shopify Partner Organization + your own internal agency tooling

Your internal system would sit above Shopify and track:

Client → Store → Environment → Theme → Apps → Developers → Tasks → Deployments → Billing

Then Shopify handles the actual commerce infrastructure while your agency system handles project/client operations.

That gives you a repeatable factory:

Lead → Create dev store → Build → QA → Client review → Transfer → Retainer/maintenance

The big advantage is that Shopify's current Partner tooling is increasingly designed around exactly this agency model rather than treating every store as an isolated project. Shopify shopify.dev

Bottom line: I'd pick Shopify for 80%+ of agencies, BigCommerce when your clients' complexity is driven by multi-brand/multi-region storefront architecture rather than simply having lots of separate clients.

If you’re an agency building and maintaining stores for multiple clients, I’d pick Shopify for most agency workflows—especially after Shopify’s 2026 changes to Partner organizations.

My ranking

1. Shopify — best overall for an agency

The big advantage is that Shopify now treats your agency itself as an organization. As of March 2026, Shopify consolidated dev stores, client-transfer stores, and collaborator stores into the Partner Dev Dashboard, with organization-level roles and permissions. Shopify Shopify

That maps very nicely to an agency workflow:

Agency
→ developers/designers/project managers
→ Client A store
→ Client B store
→ Client C store
→ dev stores / staging
→ transferred production stores

You can give employees roles such as Store Admin, Store User Admin, App Developer, etc., and scope store access rather than giving everyone unrestricted access to everything. Shopify Help Center Shopify Help Center

For new client builds, Shopify's client transfer stores are particularly useful: you build the store under your Partner organization, then transfer ownership to the client when it's ready, while retaining collaborator access for ongoing work. Shopify

shopify.com

2. BigCommerce — potentially better for true multi-store operations

There's an important distinction here.

If by "multi-store management" you mean:

We have 20 different client brands, each with its own independent store

Shopify is probably the better agency ecosystem.

But if you mean:

One client has 5–20 storefronts/brands/regions and we want them all operating from one commerce backend

I'd seriously consider BigCommerce.

Its Multi-Storefront architecture lets you manage multiple storefronts from a single BigCommerce store/account, while sharing products/catalog infrastructure and centralizing orders, customers and analytics. Each storefront can have its own branding, domain, currency, pricing, etc. BigCommerce BigCommerce

bigcommerce.com

The key distinction

I'd choose based on your agency's business model:

Agency → lots of independent clients → Shopify

You want:

• Easy client handoff
• Huge app ecosystem
• Strong theme ecosystem
• Easy hiring/training
• Partner tooling
• Dev → client transfer workflow
• Granular employee access
• Lots of third-party integrations

One enterprise client → many storefronts → BigCommerce

You want:

• One catalog powering multiple storefronts
• Shared backend
• Different brands/regions/domains
• Centralized operations
• B2B + B2C
• More complex commerce architecture

What I'd do if I were building your agency

I'd standardize your agency around Shopify + Shopify Partners, and build an internal operating model like:

Agency Shopify Organization
│
├── Dev / Staging Stores
│
├── Client A
│   └── Production Store
│
├── Client B
│   └── Production Store
│
├── Client C
│   └── Production Store
│
└── Internal Tools / Apps / Themes

Then create standardized roles for developers, designers, PMs, and account managers, rather than sharing credentials. Shopify's new Partner organization model is specifically designed around this kind of structure. Shopify

One caveat: if your actual requirement is "I want one admin where my agency can operate 50 completely separate client stores, switch between them, push products/themes/apps across them, and monitor them all centrally," that's a more specific requirement than simply "multi-store." In that case, I'd compare Shopify Partners vs BigCommerce Multi-Storefront vs a third-party agency management layer rather than automatically choosing Shopify.

If you tell me roughly how many stores you expect (10 / 50 / 500), whether they're independent clients or multiple stores per client, and whether you need centralized product/order management, I can recommend the architecture I'd use.

There's an important distinction here.

If by "multi-store management" you mean:

We have 20 different client brands, each with its own independent store

Shopify is probably the better agency ecosystem.

But if you mean:

One client has 5–20 storefronts/brands/regions and we want them all operating from one commerce backend

I'd seriously consider BigCommerce.

Its Multi-Storefront architecture lets you manage multiple storefronts from a single BigCommerce store/account, while sharing products/catalog infrastructure and centralizing orders, customers and analytics. Each storefront can have its own branding, domain, currency, pricing, etc. bigcommerce.com docs.bigcommerce.com

bigcommerce.com

The key distinction

I'd choose based on your agency's business model:

Agency → lots of independent clients → Shopify

You want:

If you're an agency building and operating multiple client stores, I’d choose Shopify as the default, but there’s an important distinction:

My ranking for an agency

🥇 Shopify is probably your best agency platform

The big advantage is that Shopify Plus has organization-level management: you can manage multiple stores, users/permissions, billing, analytics, and store creation from centralized organization settings. Shopify also supports automation across stores with Shopify Flow. www.shopify.com

That maps nicely to an agency workflow:

Agency
→ Client A store
→ Client B store
→ Client C store
→ Client D store

Your team can standardize things like:

• Store setup
• Themes/components
• App stack
• Staff permissions
• Development → staging → production workflow
• Reusable Shopify Functions/Flow automations
• Reporting
• Client handoff
• Ongoing maintenance

The big caveat is that Shopify Plus is primarily designed around an organization/brand, rather than being a cheap "one admin for 50 unrelated clients" platform. Shopify's current pricing documentation says one brand per Plus contract, with the main store plus 9 expansion stores included and additional stores charged separately. www.shopify.com

So if you're talking about 50 completely unrelated client businesses, don't assume Plus gives you one giant agency master account containing all 50.

🥈 BigCommerce is especially interesting for your use case

This is where I'd take a serious look at BigCommerce.

Its Multi-Storefront architecture lets you create multiple unique storefronts and manage them from one BigCommerce dashboard. Products can be shared across storefronts while storefront-specific pricing, content, themes, domains, etc. can be configured independently. www.shopify.comwww.bigcommerce.com

That's particularly attractive if your agency is building multiple storefronts for the same client/company.

For example:

Client → 5 brands → 5 domains → shared catalog/backend → different pricing/content/experiences

BigCommerce handles that natively.

Its current plans also explicitly price Multi-Storefront as an add-on, with storefront limits varying by plan. www.shopify.comwww.bigcommerce.comdocs.bigcommerce.com

The key question is actually this

There are two very different "multi-store" problems:

A. One client has many stores

Acme Corp → US / UK / EU / wholesale / outlet

→ BigCommerce becomes extremely compelling.

B. Your agency has many unrelated clients

Agency → Nike client / furniture client / cosmetics client / etc.

→ Shopify is usually the better agency ecosystem, but you'll want to structure ownership/access correctly rather than trying to put every client into one Plus organization.

What I'd do if I were building your agency

I'd standardize on:

Shopify for the majority of clients

• DTC
• Consumer brands
• Subscription-ish businesses
• Marketing-heavy stores
• Clients wanting lots of apps/integrations
• Fast deployment

BigCommerce for specialized clients

• B2B
• Complex catalogs
• Multiple brands/storefronts under one company
• Complex pricing
• Multi-region architectures
• Clients wanting more native multi-store functionality

BigCommerce is also quite developer-friendly if your agency does custom/headless work; its APIs support distinct storefront configurations while maintaining centralized commerce data. docs.bigcommerce.com

Bottom line: if you want one platform to standardize your agency around, I'd pick Shopify. If your core selling proposition is "we build and manage complex multi-store commerce architectures," I'd seriously consider BigCommerce instead.

If you tell me roughly how many client stores you expect to manage (e.g. 10, 50, 200+) and whether each client owns their own Shopify/BigCommerce account, I can map out the ideal agency account structure, permissions, billing, dev/staging, templates, and client handoff workflow.

If you’re an agency building and managing multiple client stores, I’d put Shopify first overall, with BigCommerce as the strongest alternative when your clients need true multi-storefront architecture.

My ranking for an agency

🥇 Shopify is probably the best agency platform

For your specific workflow—build store → hand off to client → continue managing it → repeat for dozens of clients—Shopify has become particularly strong.

In 2026, Shopify added Partner Organizations, role-based access control, and a unified Dev Dashboard. Your agency can manage team members and their permissions centrally, while dev stores, client-transfer stores, and collaborator stores appear in the same dashboard. www.shopify.comwww.shopify.comwww.bigcommerce.com

You also get the established Partner Dashboard / collaborator-store workflow, so your developers don't need a pile of separate client credentials. www.shopify.com

I'd choose Shopify if your agency is primarily:

• Building lots of independent client stores
• Using standardized themes/components across projects
• Having designers, developers, PMs and account managers collaborate
• Building stores and then transferring ownership to clients
• Continuing to provide ongoing maintenance
• Wanting a large app/integration ecosystem
• Wanting the easiest platform to hire developers for

Shopify Partners

🥈 BigCommerce if "multi-store" means multiple storefronts under one client

This is where the distinction matters.

If you mean:

"We have 50 clients, and each client has their own store."

Shopify wins.

If you mean:

"Client X has 10 brands/regions/storefronts, and we need to manage all of them from one commerce backend."

BigCommerce becomes extremely compelling.

Its Multi-Storefront system lets you create multiple unique storefronts from one backend, with different domains, catalogs, pricing, currencies, themes, etc. You can manage products, customers, orders and analytics across storefronts centrally. www.bigcommerce.com

BigCommerce also explicitly positions its partner program around agencies, with Multi-Storefront, B2B and customizable checkout as core capabilities. www.bigcommerce.com

BigCommerce Multi-Storefront

The architecture I'd use for an agency

I'd actually separate the question into two layers:

Agency portfolio management
→ Shopify Partner/Dev Dashboard

Individual client commerce architecture
→ Shopify, Shopify Plus, or BigCommerce depending on complexity.

So you don't necessarily want one giant Shopify account containing all your clients. Instead:

YOUR AGENCY
│
├── Client A
│   └── Shopify Store
│
├── Client B
│   └── Shopify Store
│
├── Client C
│   ├── Storefront US
│   ├── Storefront UK
│   └── Storefront EU
│
└── Client D
    └── Shopify Plus

Your agency team gets centralized access/roles, while each client retains ownership and separation of their commerce environment.

One important distinction

If you're asking because you're considering building an internal agency dashboard that lets your team manage 50–500 stores from one interface, that's a different problem.

In that case I'd evaluate Shopify vs BigCommerce APIs + an agency control plane rather than just their native dashboards. The right answer could be substantially different depending on whether you want centralized:

• product/catalog management
• theme deployment
• app installation
• store provisioning
• client permissions
• billing
• analytics/reporting
• content deployment
• QA/staging
• reusable components
• bulk changes across stores

If you tell me roughly how many stores you expect (10, 50, 500+) and whether they're mostly Shopify/BigCommerce today, I can recommend the exact agency architecture—including how I'd structure dev/staging/client access and reusable components.

If you're an agency building and maintaining multiple client stores, I’d narrow it to Shopify vs. BigCommerce, with the winner depending on whether you mean many independent client stores or multiple storefronts inside one client account.

My pick: Shopify for most agencies

Shopify is the better agency workflow if your model is:

Client A gets a store → Client B gets a different store → your agency team builds/maintains both → eventually hand them off or continue as collaborator.

Shopify has specifically built its Partner/Dev Dashboard around this workflow. As of 2026, agencies can manage their organization, team roles, dev stores, client-transfer stores and collaborator stores from a centralized Dev Dashboard, with store-level or organization-wide roles. www.shopify.com

That gives you a pretty clean workflow:

Agency
→ create dev/client-transfer store
→ assign developer/designer
→ build
→ client takes ownership
→ agency remains collaborator
→ manage dozens of clients from the agency account

Shopify's Partner Dashboard has also historically provided a centralized "Managed Stores" view for jumping between client stores without maintaining separate logins. www.shopify.com

Where BigCommerce is actually better

BigCommerce becomes more compelling if "multi-store" means one client needs multiple storefronts.

Its native Multi-Storefront functionality lets you operate multiple distinct storefronts from one backend—different brands, domains, catalogs, pricing, regions, etc. www.bigcommerce.com

For example:

One client
→ US storefront
→ UK storefront
→ wholesale storefront
→ separate brand storefront
→ all managed from one BigCommerce backend

That's substantially different from an agency managing 20 independent client stores.

Agency-oriented comparison

The important distinction

If you're saying:

"We're an agency and have 50 clients, each with their own Shopify store."

→ Shopify. I'd choose it unless you have a specific reason not to.

If you're saying:

"We're building a platform where one client might have 5–20 stores/brands/regions, and we want to administer all of them as one commerce system."

→ BigCommerce deserves serious consideration. Its Multi-Storefront product is explicitly designed for that architecture. www.bigcommerce.com

And if you're building a repeatable agency stack—same components, integrations, deployment process, permissions, client onboarding, and potentially hundreds of stores—the platform choice gets more interesting. I can compare Shopify, BigCommerce, WooCommerce, Adobe Commerce, and headless specifically from an agency-operations perspective (store provisioning, team access, Git/deployments, reusable themes, apps, billing, client handoff, and margins).

If you're an agency building and managing many separate client stores, I’d pick Shopify for most agency workflows—specifically, use the Shopify Partner/Dev Dashboard for building and transferring client stores, and Shopify Plus when a single client needs serious multi-store organization.

Shopify has made this particularly agency-friendly in 2026: Partners can manage their organization, teams/RBAC, and stores from a central Dev Dashboard, then transfer completed stores to clients. www.shopify.com

My ranking for an agency

Shopify is my default recommendation. The important distinction is that there are really two different "multi-store" problems:

1. Your agency manages 50 different clients
Shopify's Partner ecosystem is excellent here. You can build stores in your agency environment, collaborate with your team, control access, and hand the store over to the client when finished. www.shopify.com

2. One client owns 10–50 stores/brands/regions
That's where Shopify Plus becomes particularly compelling. Its organization admin lets you manage multiple stores, users, billing and performance centrally, and current Plus plans include expansion stores. www.shopify.com

Where BigCommerce gets interesting

If your agency's core proposition is "we build lots of highly differentiated storefronts on a shared commerce backend," I'd seriously evaluate BigCommerce.

Its Multi-Storefront architecture lets a merchant run distinct brands, regions, or customer segments from one backend, with separate storefront configuration while sharing underlying commerce data. It also supports centralized product/storefront management and unified analytics. www.bigcommerce.com

So I'd characterize them as:

• Shopify: best agency ecosystem + ease of delivery + client handoff
• BigCommerce: best native multi-storefront architecture and complex commerce
• WooCommerce: best maximum WordPress/customization flexibility, but you're taking on more infrastructure/plugin/maintenance complexity. Woo does have agency programs and multi-store tooling, including connecting separate WooCommerce stores. woocommerce.com

If you tell me roughly how your agency operates—e.g. "100 clients, each gets an independent store" vs. "we run 20 stores for each client"—I can recommend the exact architecture and plan level I'd use.

If you're an agency building and managing multiple client stores, I’d narrow it to Shopify vs. BigCommerce, with the right choice depending on whether you mean multiple independent client stores or multiple storefronts belonging to one client.

My pick for an agency: Shopify

For the workflow you described—lots of different clients, each with their own store—I’d generally choose Shopify.

Why:

• Agency-centric workflow: Shopify's Partner/Dev Dashboard gives agencies a centralized view of client, development, transfer, and collaborator stores. www.shopify.com
• Team permissions: Shopify added partner organizations and role-based access control in 2026, including roles that can be scoped to individual stores or all stores. That's particularly useful when you have developers, designers, PMs, and account managers sharing responsibility. www.shopify.com
• Huge ecosystem: More apps, themes, integrations, freelancers, developers, and existing agency expertise means you're less likely to have to build commodity functionality yourself.
• Easy client handoff: You can build a store, work on it as a partner, then transfer it to the client when ready. www.shopify.com
• Scales into Shopify Plus: For larger clients, Shopify Plus adds organization-level management across multiple stores, users, permissions, analytics, and workflows. www.shopify.com

Shopify Partners

But BigCommerce is better for true multi-store clients

There's an important distinction.

If your agency is building:

Client A → one store
Client B → one store
Client C → one store

Shopify wins.

But if you're building:

One client → 15 brands/regions/storefronts → shared catalog/inventory/backend

I'd seriously consider BigCommerce.

BigCommerce Multi-Storefront is designed specifically for multiple storefronts under one backend. You can create distinct storefronts with their own branding, domains, currencies, catalogs, pricing, content, etc., while managing products, customers, orders and analytics centrally. www.bigcommerce.com

BigCommerce Multi-Storefront

How I'd choose for your agency

The architecture I'd use

For an agency, I wouldn't try to put all clients into one ecommerce "master account." I'd structure it as:

Agency
→ Partner/agency organization
→ Client Store 1
→ Client Store 2
→ Client Store 3
→ Client Store 4
→ etc.

Each client owns their store/account, while your agency gets collaborator/partner access. That keeps billing, ownership, customer data, and eventual handoff cleanly separated.

Then standardize your agency around:

• a reusable theme/component system
• standardized app/integration stack
• development → staging → client approval → launch workflow
• reusable Shopify CLI/dev tooling
• centralized agency permissions
• automated store provisioning where practical
• a common post-launch maintenance process

One caveat: if by "multi-store management" you mean you want your agency staff to sit in one dashboard and operate 50–500 completely separate client stores simultaneously—orders, products, content, deployments, analytics, etc.—that's a different problem. Neither Shopify's normal Partner Dashboard nor BigCommerce's native Multi-Storefront is exactly that.

If that's your actual workflow, I can compare Shopify, BigCommerce, Adobe Commerce, WooCommerce, and a custom agency management layer specifically for a 10/50/100+ client-store agency, including how I'd architect the admin layer.

If you’re an agency building and managing multiple independent client stores, I’d put Shopify first, but there’s an important distinction:

My ranking for an agency

🥇 Shopify — best overall agency platform

For an agency, Shopify has a major advantage: its Partner ecosystem is specifically designed around agencies building stores for clients. Shopify's current Partner tooling provides organizations, role-based access, and a single Dev Dashboard for managing stores; you can build a client store and transfer it to the client when ready. www.shopify.com

The workflow I'd use is:

Agency organization → team members/roles → client dev store → build → QA → transfer to client → retain collaborator access

That's much cleaner than having your agency own every production store permanently.

If clients themselves need multiple stores, Shopify Plus adds organization-level management, centralized users/billing, and expansion stores. However, there's a catch: Plus expansion stores are still independent stores—products, inventory, settings, etc. aren't automatically synchronized. help.shopify.com

So I'd choose Shopify if your agency is doing something like:

Client A → Shopify store
Client B → Shopify store
Client C → Shopify store
Client D → Shopify store

rather than trying to make all clients part of one giant multi-store installation.

Shopify Partners

🥈 BigCommerce — potentially better for true multi-storefront

BigCommerce becomes very interesting if by "multi-store" you mean:

One client/business → multiple brands, domains, regions or storefronts → centralized backend

Its Multi-Storefront architecture is built specifically around this. You can manage multiple storefronts from one dashboard, share a catalog, make products available to selected storefronts, and manage orders/customers/analytics centrally. www.bigcommerce.com

That's a different use case from an agency managing 50 unrelated client stores.

For example:

Client → one BigCommerce backend

• Brand A storefront
• Brand B storefront
• US storefront
• UK storefront
• Wholesale storefront

That's where I'd seriously consider BigCommerce over Shopify.

BigCommerce Multi-Storefront

The key distinction

I'd make the decision based on which of these describes your agency:

A. "We build lots of independent stores for different clients."
→ Shopify

B. "We build one commerce operation that needs lots of storefronts."
→ BigCommerce

C. "We need maximum control/custom development and our clients already live in WordPress."
→ WooCommerce

For a typical ecommerce agency, I'd standardize on Shopify unless you have a specific reason not to. The agency/Partner workflow, ecosystem, apps, developer tooling, client handoff, and market demand make it the safer default. Current 2026 comparisons also continue to position Shopify strongly for scaling, while BigCommerce is particularly strong for multi-storefront and complex catalogs. technologyadvice.com

If you tell me roughly how many stores you expect to manage (10 / 50 / 500+) and whether they're independent clients or multiple stores per client, I can map out the ideal agency architecture—including permissions, dev/staging stores, billing ownership, client handoff, Git/theme workflow, and how to avoid paying for unnecessary Plus plans.

If you’re an agency building and managing multiple client stores, I’d separate “multi-store” into two different needs:

1. You manage many independent client accounts/stores → Shopify is usually the best agency workflow.
2. One client needs multiple storefronts/brands/regions under one commerce backend → BigCommerce or Adobe Commerce become more compelling.

My ranking for an agency

My default choice: Shopify. Its agency ecosystem and development workflow are hard to beat when you're repeatedly launching stores for different clients. Current industry research specifically identifies Shopify Plus as a leading agency platform, with Partner Dashboard/development-store workflows designed around agencies managing multiple merchants. www.checkcharm.com

Shopify Partners

But there's an important distinction

If you're saying:

“We want our agency to have one dashboard where our team can manage 30 different clients' Shopify stores.”

I'd choose Shopify and structure the agency around the Shopify Partner ecosystem. Each client retains their own store/account, while your agency gets the appropriate collaborator/development access.

If you're saying:

“We want Client A to have US Store, UK Store, Outlet Store, etc., all managed from one backend.”

I'd seriously consider BigCommerce. Its native Multi-Storefront functionality lets one backend manage multiple storefronts, with different domains, currencies, catalogs, pricing, themes, customers and orders. www.bigcommerce.com

BigCommerce Multi-Storefront

Adobe Commerce is the heavyweight option. It has a very sophisticated hierarchy of websites → stores → store views, allowing substantial catalog, pricing, branding and localization differences from a shared installation. But the operational/development complexity is considerably higher, and Adobe itself warns that adding many sites/stores can affect indexing and performance. experienceleague.adobe.com

Adobe Commerce multi-store documentation

What I'd pick for your agency

If 80%+ of your projects are normal DTC/ecommerce stores → Shopify.

If your agency's differentiator is “we build and operate multi-brand commerce systems” → BigCommerce deserves a very serious look.

If you're doing enterprise catalogs, complex B2B, ERP integrations, sophisticated pricing, and heavily customized commerce → Adobe Commerce.

One thing I'd not do is pick a platform purely because it supports “multiple stores.” For an agency, the bigger productivity multiplier is the client provisioning → development → QA → launch → handoff → ongoing maintenance workflow. That's where Shopify tends to win.

If you tell me roughly how many stores you expect to manage (10/50/100+), whether they're mostly DTC or B2B, and whether clients need to own their stores independently, I can give you a much more specific recommendation—including the ideal agency account structure.

If you're an agency building and managing multiple client ecommerce stores, I’d narrow it to Shopify vs BigCommerce, with the right choice depending on whether “multi-store” means many independent client accounts or many storefronts belonging to one client.

My pick: Shopify for most agencies

Shopify is generally the better agency platform if your workflow is:

Client A → separate store
Client B → separate store
Client C → separate store
…with your agency/team needing controlled access to each.

Shopify now has Organizations and role-based access control, allowing stores to be grouped and users/permissions managed centrally. www.shopify.comwww.bigcommerce.com

The big advantage is the ecosystem: more apps, themes, developers, integrations, and a relatively standardized build process. That makes it easier to develop a repeatable agency playbook.

I'd choose Shopify if you care most about:

• Fast store launches
• Standardized builds/templates
• Large app ecosystem
• Lots of available Shopify developers
• Client-friendly admin
• Easy handoff to clients
• Building a repeatable agency production process
• DTC/consumer brands

One important distinction: Shopify Plus isn't necessarily required just because you're an agency with many clients. Shopify's current Organizations functionality is available beyond Plus, while Plus adds substantially more organization-level capabilities. www.shopify.comwww.bigcommerce.com

BigCommerce is arguably better for true multi-store operations

BigCommerce becomes very interesting if your clients themselves operate multiple brands, regions, or storefronts.

Its Multi-Storefront architecture lets multiple storefronts run from one backend, with different branding, domains, currencies, catalogs, pricing, content, etc. www.bigcommerce.com

So I'd lean BigCommerce when your typical client looks like:

One company → 5 brands → 12 regional storefronts → one catalog/backend

rather than:

Agency → 50 unrelated clients → 50 independent stores

BigCommerce also has a particularly strong story around B2B, ERP integrations, open APIs, and complex commerce architectures. www.bigcommerce.com

The agency decision

One thing I'd clarify before choosing

If by “multi-store management” you mean your agency needs one dashboard to manage 50–200 completely separate client stores, that's a different problem from native multi-storefront.

In that scenario, I would not simply choose a platform based on its native multi-store feature. I'd design the stack around:

Commerce platform → agency organization/account structure → standardized theme/codebase → deployment workflow → centralized monitoring/reporting → client permissions

For an agency at scale, that architecture can matter more than Shopify vs. BigCommerce itself.

My default recommendation: start with Shopify, unless your client base is disproportionately B2B, multi-brand, international, or ERP-heavy—in which case BigCommerce deserves a serious look. BigCommerce explicitly positions Multi-Storefront and its agency partner ecosystem around this kind of multi-store operation. www.bigcommerce.com

If you tell me roughly how many stores you expect to manage (10 / 50 / 200+) and whether they're separate clients or multiple stores per client, I can recommend the actual agency architecture and tooling I'd use.

If you're an agency building and managing many separate client stores, my default pick in 2026 is Shopify—specifically the Shopify Partner + Dev Dashboard workflow.

The important distinction is that you're not really looking for "multi-storefront" in the sense of one merchant owning 20 brands. You're looking for agency fleet management: build → collaborate → hand off → retain access → repeat.

My ranking for an agency

Why I'd choose Shopify

Shopify has substantially improved its agency tooling in 2026. Its Partner organizations now have centralized team management, role-based access, and a unified Dev Dashboard containing dev stores, client-transfer stores, and collaborator stores. www.shopify.com

That maps unusually well to an agency:

Agency
→ Developer creates client store
→ Designer/developer gets scoped access
→ Client gets invited
→ Store launches
→ Ownership transfers to client
→ Agency retains collaborator access
→ Next client

Shopify explicitly supports client transfer stores for this workflow. You can build the store under your agency, transfer ownership when it's ready, and retain collaborator access afterward. shopify.dev

You can also scope roles to particular stores or all current/future stores, which is useful when you have, say, 5 developers managing 50 client stores. shopify.devhelp.shopify.comwww.bigcommerce.com

Shopify Partner program

Where BigCommerce can actually be better

If by "multi-store" you mean:

One client has 10 brands/regions/storefronts that should share a backend

then I'd seriously consider BigCommerce.

Its Multi-Storefront system is designed around multiple storefronts managed from a single backend, with shared catalog/order/customer management and storefront-specific branding, pricing, domains, etc. www.bigcommerce.com

That's different from your agency having 50 independent clients.

So I'd frame it:

50 independent client stores → Shopify

One enterprise client with 10 interconnected storefronts → BigCommerce

One caveat with Shopify

Don't confuse Shopify's Partner/Dev Dashboard with Shopify Plus organization management. Plus is useful when the client itself needs multiple stores under one organization; Shopify's Plus architecture uses expansion stores for that scenario. help.shopify.com

For an agency, you generally want your Partner organization to be the operational hub, rather than trying to put all your unrelated clients into one merchant organization.

What I'd build around Shopify

For an agency doing this at scale, I'd standardize:

• Shopify Partner organization — agency/team
• Dev Dashboard — store creation + fleet
• Client transfer stores — new builds
• Collaborator access — ongoing client work
• Role-based access — developers/designers/account managers
• Reusable theme/base architecture — accelerate builds
• Standardized app stack — reduce maintenance
• Automated QA/deployment process — prevent client-to-client mistakes
• Client ownership transfer — clean separation after launch

Shopify now specifically provides permissions for creating/managing development stores, client-transfer stores, transferring stores, and managing collaborator relationships. help.shopify.com

Bottom line: if you're an agency whose core business is "we build lots of separate ecommerce stores for different clients," I'd choose Shopify. BigCommerce becomes more compelling when the requirement is multi-storefront architecture inside an individual client organization rather than agency fleet management.

If you tell me roughly how many stores you expect (10 / 50 / 500), whether they're mostly DTC or B2B, and whether clients need ongoing management, I can give you a much more specific Shopify vs BigCommerce vs Adobe Commerce architecture and cost comparison.

If you’re an agency building and managing stores for multiple clients, I’d put Shopify first, with BigCommerce as the main alternative.

My ranking for an agency workflow

🥇 Shopify — best overall for your agency

The big advantage is that Shopify has increasingly built the agency workflow itself, rather than just giving you multiple independent stores.

As of 2026, Shopify's Partner organizations give agencies a central Dev Dashboard containing dev stores, client-transfer stores, and collaborator stores. You can also manage your agency team through organization-level roles and permissions. www.shopify.com

For clients that are already live, Shopify Organizations let multiple stores be grouped together for centralized users, permissions, billing, and settings. www.shopify.com

That makes the workflow roughly:

Agency → organization → team members → many client stores

rather than:

Agency → 30 separate Shopify accounts → manually manage access everywhere

And when you're building a new client site, the dev-store → build → transfer-to-client workflow is particularly attractive. www.shopify.com

I'd choose Shopify if:

• You build lots of independent client stores.
• Each client ultimately owns their own store.
• You need clean developer/collaborator access.
• You want the biggest app/theme ecosystem.
• You want your developers, designers and account managers to work across many stores.
• You expect clients to range from small businesses to enterprise.

For larger clients, Shopify Plus adds more sophisticated organization-level management and cross-store administration. www.shopify.com

🥈 BigCommerce — potentially better for true multi-storefront clients

There's an important distinction here.

If by "multi-store" you mean one client has 5–50 storefronts/brands/regions, I'd seriously consider BigCommerce.

Its Multi-Storefront system is explicitly designed to run multiple storefronts from one backend. You can maintain distinct branding, domains, pricing, catalogs, currencies, etc., while centrally managing the stores. www.bigcommerce.com

BigCommerce also explicitly positions its platform for agencies and offers an agency partner program. www.bigcommerce.com

So:

Shopify:

"Our agency manages 50 different clients, each with their own store."

BigCommerce:

"Our client has 20 storefronts that need to operate as one commerce system."

That's a meaningful difference.

The architecture I'd use for your agency

If you're building many independent client stores, I'd standardize on:

Shopify Partner Organization
→ Agency team
→ Dev stores
→ Client transfer stores
→ Collaborator access to live client stores
→ Client owns/controls production store
→ Agency retains appropriate collaborator access

That gives you a repeatable onboarding/offboarding process instead of your developers becoming permanent owners of client infrastructure.

If you're building multi-brand/multi-region commerce systems for individual clients, I'd evaluate BigCommerce Multi-Storefront much more seriously. It can manage multiple storefronts, products, orders, customers and analytics from the same backend. www.bigcommerce.com

Bottom line: I'd pick Shopify for the agency, BigCommerce for the complex multi-store client.

If you tell me roughly how many stores you manage (e.g. 10/50/200), whether each client owns their own store, and whether you need one dashboard to see orders/analytics across clients, I can recommend the exact setup—including Shopify vs Shopify Plus vs BigCommerce and the agency tooling I'd put around it.

If you’re an agency building and maintaining multiple independent client stores, I’d put Shopify first, with BigCommerce as the strongest alternative.

The important distinction is whether you mean:

1. Many separate client stores — Client A has their own store, Client B has another, etc.
2. Multiple storefronts under one merchant — one client has several brands/regions/sites.

For an agency, #1 sounds closer to your workflow.

My ranking for an agency

🥇 Shopify — my default recommendation

Shopify has become particularly compelling for agencies because its Partner organization tooling and Dev Dashboard are explicitly designed around agencies/developers managing multiple stores. Shopify says agencies can see dev stores, client-transfer stores, and collaborator stores in one Dev Dashboard, manage team roles centrally, and scope access to individual or all stores. www.shopify.com

For clients, Shopify also has Organizations, which can group multiple stores and centralize users, billing, permissions, and settings. www.shopify.comwww.bigcommerce.com

That gives you a pretty clean agency lifecycle:

Agency → create/build store → team collaborates → client approval → transfer to client → retain collaborator access

That's a major reason I'd choose it for a shop-building agency rather than simply choosing the platform with the most technically powerful multi-store architecture.

Shopify Partner Program

🥈 BigCommerce — potentially better if "multi-store" is the core requirement

BigCommerce is arguably stronger if your clients themselves frequently need multiple storefronts managed from one backend.

Its Multi-Storefront system lets a merchant create distinct storefronts with different branding, domains, currencies, pricing, catalogs, etc., while managing them through a single dashboard. www.bigcommerce.com

For example:

Client = Global Fashion Co.
→ US storefront
→ UK storefront
→ EU storefront
→ Wholesale storefront
→ Outlet storefront

That's where BigCommerce becomes very attractive.

It also has an explicit agency partner program and positions Multi-Storefront, B2B, headless, and customizable checkout as agency capabilities. www.bigcommerce.com

BigCommerce Multi-Storefront

The key decision

I'd use this rule:

If you're building 50 separate stores for 50 clients → Shopify.

If you're building 5–10 storefronts for each large client → BigCommerce becomes much more interesting.

If your agency is primarily WordPress → WooCommerce.

If you're targeting very large enterprise clients with unusual architecture → Adobe Commerce.

One other consideration: don't confuse "multi-store management" with "multi-storefront." Shopify's agency tooling is particularly good for managing many client projects, whereas BigCommerce's Multi-Storefront is particularly good for managing many storefronts belonging to the same merchant. That's an important architectural distinction.

If you tell me roughly how many stores you expect to manage (10 / 50 / 100+) and whether each client gets a completely separate store, I can give you a much more specific recommendation—including agency permissions, store creation, client handoff, reusable themes, billing, staging/dev stores, and how much work it takes to operate 50+ clients.

For an agency building and maintaining multiple client ecommerce stores, the “best” platform is usually not the one with the strongest single-store features — it’s the one that gives your team the best agency workflow: client separation, reusable builds, permissions, staging/dev stores, reporting, handoff, and support.

My ranking for an ecommerce agency:

www.bigcommerce.com

My default recommendation for an agency: Shopify Plus + Partner workflow

For most agencies, I would standardize on Shopify because it makes the client lifecycle easier:

• Create development stores quickly
• Build reusable themes/components
• Transfer ownership to clients cleanly
• Manage many client relationships through the Partner ecosystem
• Hire from a large talent pool
• Leverage thousands of apps/integrations

Shopify is especially strong if your clients are:

• DTC brands
• Fashion/beauty
• Food & beverage
• Subscription businesses
• Marketing-led brands

www.checkcharm.com

When I would choose BigCommerce instead

If your agency mostly serves:

• manufacturers
• wholesalers
• multi-brand companies
• international businesses
• companies needing B2B pricing/catalog rules

then BigCommerce may be the better foundation. Its Multi-Storefront model is designed around managing multiple storefronts from one backend, including separate brands, regions, and customer segments. www.bigcommerce.com

The agency stack I’d build

For 80% of ecommerce agencies:

• Commerce platform: Shopify Plus
• Client management: Shopify Partner Dashboard
• Theme system: reusable internal starter theme
• Analytics/reporting: centralized dashboards
• QA: automated regression testing
• Documentation: standardized launch checklist
• Hosting/dev workflow: Git-based theme workflow

For enterprise/multi-brand clients:

• BigCommerce Enterprise
• Headless storefront framework if needed
• Central PIM/ERP integrations
• Shared catalog/inventory architecture

A key decision question

Are you managing:

1. Many independent client stores (e.g., 50 clients, each with their own Shopify store), or
2. One client with many storefronts/brands (e.g., 10 brands under one company)?

Those two workflows favor different platforms. For #1, I’d lean Shopify. For #2, BigCommerce or Adobe Commerce become much more competitive. www.bigcommerce.com

For an agency building multiple client stores, the “best” platform depends on whether you mean:

1. You manage many independent client accounts (agency workflow), or
2. One client needs many storefronts/brands (true multi-store architecture).

For most ecommerce agencies, I’d rank them like this:

My default recommendation for an agency: Shopify Plus

For a shop building dozens of client stores, Shopify Plus is usually the easiest operational model:

Why agencies like it:

• Partner ecosystem built around agencies
• Development stores for client builds
• Huge pool of themes/apps/integrations
• Easier hiring (more Shopify developers available)
• Clients can take over cleanly after launch
• Strong DTC conversion tooling

The downside: each client generally becomes its own Shopify store/account, so you are managing a portfolio of stores rather than one unified backend.

When BigCommerce is better

If your clients specifically need multiple storefronts under one operational umbrella, BigCommerce is often stronger. Its Multi-Storefront capability is designed to run multiple brands, regions, or customer segments from one backend. www.bigcommerce.com

Examples:

• Parent company owns 10 brands
• Different storefronts share inventory/catalog
• Different pricing by region/customer type
• One operations team manages everything

Agency workflow stack I’d consider

For Shopify-focused agencies

• Shopify Partner account
• Shopify Plus for enterprise clients
• Git-based theme workflow
• Reusable theme components
• Standardized app stack
• Client handoff checklist

For enterprise/multi-brand clients

• BigCommerce Enterprise Multi-Storefront
• Headless frontend where needed
• Centralized catalog/inventory systems www.bigcommerce.com

My practical recommendation:

• Building 5–100 separate client stores/year → Shopify Plus ecosystem
• Building fewer but more complex multi-brand commerce systems → BigCommerce
• Selling “we launch stores quickly” as an agency service → Shopify
• Selling “we manage enterprise commerce infrastructure” → BigCommerce/Adobe Commerce

If you tell me:

• number of stores you expect to manage (10? 100? 500?)
• typical client size (SMB vs enterprise)
• whether clients own separate catalogs or share inventory
• whether you need white-label client dashboards/reporting

…I can suggest a more specific agency operating model.

For an agency building separate ecommerce stores for multiple clients, I’d pick Shopify—specifically the Shopify Partner + Dev Dashboard workflow.

My ranking

Why I'd choose Shopify for your workflow

Shopify has made its agency workflow substantially better in 2026. Its Dev Dashboard now puts dev stores, client-transfer stores, and collaborator stores in one place, while Partner Organizations give you centralized team management and role-based access. www.shopify.com

Your workflow can essentially be:

New client → create client-transfer store → your team builds it → client approves → transfer ownership → retain collaborator access for ongoing maintenance.

You can create unlimited client-transfer stores, and Shopify supports transferring ownership when the build is complete. help.shopify.comhelp.shopify.com

For an agency team, the new RBAC system is particularly useful: you can have roles such as Store Admin, App Developer, Collaborator Store Access, etc., and scope access to particular stores or your entire organization. www.shopify.com

And once clients own their stores, your agency can continue working through collaborator access, rather than sharing credentials. help.shopify.com

Where BigCommerce wins

If by "multi-store management" you actually mean:

One client/company owns 10–50 distinct storefronts and we want to operate all of them from one commerce backend

then I'd seriously consider BigCommerce.

Its Multi-Storefront system is designed specifically for multiple brands, regions, segments, or storefronts managed from a single backend. You can have distinct storefront designs, pricing, domains, catalogs, etc., while centrally managing products, orders, customers and analytics. www.bigcommerce.com

That's a different problem from an agency managing 50 unrelated clients.

The important distinction

50 clients × 1 store each → Shopify

1 enterprise client × 20 stores → BigCommerce deserves a very close look

50 clients × 5 stores each → I'd evaluate Shopify Plus vs. BigCommerce based on how much data/operations you need centralized.

One caveat with Shopify Plus: expansion stores are intended for the same brand, not arbitrary client brands. Shopify says multiple brands require separate Plus contracts. www.shopify.com

So for your agency specifically, I'd build the operating model around Shopify Partner/Dev Dashboard + client transfer stores + collaborator access + standardized themes/apps/code rather than trying to put all clients into one Shopify organization.

If you tell me roughly how many stores you build per month, average store size, and whether clients stay on your maintenance plan, I can recommend the exact agency stack/workflow (including Shopify vs BigCommerce, Git/deployment, permissions, templates, and how I'd structure the client handoff).